Там это отдельное поле «Теги» (список автодополнение).

[[!ms2GalleryResources?
    &tpl=`proekt-item-portfolio`
    &parents=`394`
    &limit=`6`
    &where=`["1 = 1 AND FIND_IN_SET('[[*portfolio_item]]', replace(portfolio_item, '||', ','))"]`
    &includeThumbs=`medium`
    &includeTVs=`portfolio_item`
    &depth=`0`
    &showLog=`1`
]]

{'!ms2GalleryResources' | snippet : [
    'tpl' => 'proekt-item-portfolio'
    'parents' => '394'
    'limit' => '6'
    'where' => ["1 = 1 AND FIND_IN_SET("~$_modx->resource.portfolio_item~", replace(portfolio_item, '||', ','))"],
    'includeThumbs' => 'medium'
    'includeTVList' => 'portfolio_item'
    'depth' => '0'
    'showLog' => '1'
]}

0.0000520: Loaded model "ms2gallery" from "/core/components/ms2gallery/model/"
0.0000269: pdoTools loaded
0.0000110: xPDO query object created
0.0002151: Included list of tvs: portfolio_item
0.0000780: leftJoined msResourceFile as medium
0.0000532: leftJoined modTemplateVarResource as TVportfolio_item
0.0000861: Added selection of modResource: `id`, `type`, `contentType`, `pagetitle`, `longtitle`, `description`, `alias`, `alias_visible`, `link_attributes`, `published`, `pub_date`, `unpub_date`, `parent`, `isfolder`, `introtext`, `richtext`, `template`, `menuindex`, `searchable`, `cacheable`, `createdby`, `createdon`, `editedby`, `editedon`, `deleted`, `deletedon`, `deletedby`, `publishedon`, `publishedby`, `menutitle`, `donthit`, `privateweb`, `privatemgr`, `content_dispo`, `hidemenu`, `class_key`, `context_key`, `content_type`, `uri`, `uri_override`, `hide_children_in_tree`, `show_in_tree`, `properties`
0.0000072: Added selection of msResourceFile: `url` as `medium`,`name` as `medium.name`,`description` as `medium.description`,`createdon` as `medium.createdon`,`createdby` as `medium.createdby`,`properties` as `medium.properties`,`alt` as `medium.alt`,`add` as `medium.add`
0.0000041: Added selection of modTemplateVarResource: IFNULL(`value`, '') AS `tv.portfolio_item`
0.0000072: Replaced TV conditions
0.0004930: Processed additional conditions
0.0005889: Added where condition: 0=1 = 1 AND FIND_IN_SET(Блок-контейнеры, replace(`TVportfolio_item`.`value`, '||', ',')), modResource.parent:IN(394), modResource.published=1, modResource.deleted=0
0.0000019: Replaced TV conditions
0.0000300: Sorted by modResource.publishedon, DESC
0.0000010: Limited to 6, offset 0
0.0001161: SQL prepared "SELECT `modResource`.`id`, `modResource`.`type`, `modResource`.`contentType`, `modResource`.`pagetitle`, `modResource`.`longtitle`, `modResource`.`description`, `modResource`.`alias`, `modResource`.`alias_visible`, `modResource`.`link_attributes`, `modResource`.`published`, `modResource`.`pub_date`, `modResource`.`unpub_date`, `modResource`.`parent`, `modResource`.`isfolder`, `modResource`.`introtext`, `modResource`.`richtext`, `modResource`.`template`, `modResource`.`menuindex`, `modResource`.`searchable`, `modResource`.`cacheable`, `modResource`.`createdby`, `modResource`.`createdon`, `modResource`.`editedby`, `modResource`.`editedon`, `modResource`.`deleted`, `modResource`.`deletedon`, `modResource`.`deletedby`, `modResource`.`publishedon`, `modResource`.`publishedby`, `modResource`.`menutitle`, `modResource`.`donthit`, `modResource`.`privateweb`, `modResource`.`privatemgr`, `modResource`.`content_dispo`, `modResource`.`hidemenu`, `modResource`.`class_key`, `modResource`.`context_key`, `modResource`.`content_type`, `modResource`.`uri`, `modResource`.`uri_override`, `modResource`.`hide_children_in_tree`, `modResource`.`show_in_tree`, `modResource`.`properties`, `medium`.`url` as `medium`, `medium`.`name` as `medium.name`, `medium`.`description` as `medium.description`, `medium`.`createdon` as `medium.createdon`, `medium`.`createdby` as `medium.createdby`, `medium`.`properties` as `medium.properties`, `medium`.`alt` as `medium.alt`, `medium`.`add` as `medium.add`, IFNULL(`TVportfolio_item`.`value`, '') AS `tv.portfolio_item` FROM `kfsz8k4f2Ra7_site_content` AS `modResource` LEFT JOIN `kfsz8k4f2Ra7_ms2_resource_files` `medium` ON `medium`.`resource_id` = `modResource`.`id` AND `medium`.`parent` != 0 AND `medium`.`path` LIKE '%/medium/%' AND `medium`.`active` = 1 AND `medium`.`rank` = 0 LEFT JOIN `kfsz8k4f2Ra7_site_tmplvar_contentvalues` `TVportfolio_item` ON `TVportfolio_item`.`contentid` = `modResource`.`id` AND `TVportfolio_item`.`tmplvarid` = 19 WHERE  ( 1 = 1 AND FIND_IN_SET(Блок-контейнеры, replace(`TVportfolio_item`.`value`, '||', ',')) AND `modResource`.`parent` IN (394) AND `modResource`.`published` = 1 AND `modResource`.`deleted` = 0 )  ORDER BY modResource.publishedon DESC LIMIT 6 "
0.0002279: Could not process query, error #1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Блок-контейнеры, replace(`TVportfolio_item`.`value`, '||', ',')) AND `modResource`.`pa' at line 1
0.0015500: Total time
2 097 152: Memory usage

<?php
$id = $modx->getOption('id', $scriptProperties, $modx->resource->get('id'));
$table = $modx->getOption('table_prefix').'ms2_products';
if($query = $modx->query("SELECT * FROM {$table} WHERE id = {$id}")){
	$prod = $query->fetch(PDO::FETCH_ASSOC);
	$tags = json_decode($prod['tags'], 1);
	foreach($tags as $tag){
	    $out .= $modx->getChunk($tpl, array('tag' =>  $tag));
	}
}
return $out;

[[getTags? &tpl=`tag_tpl`]]

[[getTags? &id=`[[+id]]` &tpl=`tag_tpl`]]

<a href="/search/?[[+tag]]" class="some-class">[[+tag]]</a>

т.е. там нет двух или трех id через запятую

<?php
/*
 * Smarty plugin
 * -------------------------------------------------------------
 * Файл:    modifier.field.php
 * Тип:     modifier
 * Имя:     field
 * Назначение:  Get a field of the specified resource.
 * -------------------------------------------------------------
 */
function smarty_modifier_field($id, $field)
{
    global $modx;

    $id = (int)$id;
    if ($id && $resource = $modx->getObject('modResource', ['id' => $id])) {
        return $resource->{$field};
    }

    return null;
}

<?php
// Плагин
// Событие OnModxInit

if ($modx->context->key !== 'mgr') {
    function fieldModifier($id, $field)
    {
        global $modx;
    
        $id = (int)$id;
        if ($id && $resource = $modx->getObject('modResource', ['id' => $id])) {
            return $resource->{$field};
        }
    
        return null;
    }

    // Регистрируем функцию модификатора
    $smarty = parserx();
    $smarty->registerPlugin("modifier","field", "fieldModifier");
}

{5|field:"pagetitle"}
// Можно вернуть дефолтное значение
{5|field:"pagetitle"|default:"Ресурс не найден!"}

{var $output = 'ms2GalleryResources' | snippet: [
    'tpl' => 'proekt-item-portfolio',
    'parents' => '394',
    'where' => '{ "connection:=":"'~$_modx->resource.connection~'","connection:!=":"1"}',
    'limit' => '6',
    'includeThumbs' => 'medium',
    'includeTVList' => 'days, connection, video',
    'depth' => '0',
    'showLog' => '1'
]}
{if $output}
<h3 class="text-center">{$_modx->resource.connection} в наличии</h3>
<div class="row flex-content-center">
{$output}
</div>
{/if}

<?php
class msCartCustomHandler extends msCartHandler {
    /**
    * msCartCustomHandler constructor.
    *
    * @param miniShop2 $ms2
    * @param array $config
    */
    public function __construct(miniShop2 $ms2, array $config = array())
    {
        $this->ms2 = $ms2;
        $this->modx = $ms2->modx;

        $cityFields = $this->modx->getService('cityfields','cityFields', $this->modx->getOption('cityfields.core_path', null, $this->modx->getOption('core_path').'components/cityfields/').'model/cityfields/');
        if ($cityFields instanceof cityFields) {
            if (!empty($cityFields->currentCityId)) {
                $currentCityId = $cityFields->currentCityId;
            }
            
        }
        $this->config = array_merge(array(
            'currentCityId' => $currentCityId,
            'cart' => & $_SESSION['minishop2']['cart'],
            'max_count' => $this->modx->getOption('ms2_cart_max_count', null, 1000, true),
            'allow_deleted' => false,
            'allow_unpublished' => false,
        ), $config);

        $this->cart = &$this->config['cart'];
        $this->modx->lexicon->load('minishop2:cart');

        if (empty($this->cart) || !is_array($this->cart)) {
            $this->cart = array();
        }
    }
    
   /**
     * @param array $data
     *
     * @return array
     */
    public function status($data = array())
    {
        $status = [
            'total_count' => 0,
            'total_cost' => 0,
            'total_weight' => 0,
            'total_discount' => 0,
            'total_positions' => count($this->cart),
        ];
        foreach ($this->cart as $item) {
            if (empty($item['ctx']) || $item['ctx'] == $this->ctx) {
                $status['total_count'] += $item['count'];
                $status['total_cost'] += $item['price'] * $item['count'];
                $status['total_weight'] += $item['weight'] * $item['count'];
                $status['total_discount'] += $item['discount_price'] * $item['count'];
            }
        }

        $status = array_merge($data, $status);

        $response = $this->ms2->invokeEvent('msOnGetStatusCart', [
            'status' => $status,
            'cart' => $this,
        ]);
        if ($response['success']) {
            $status = $response['data']['status'];
        }
        $this->modx->log(1, print_r($this->config['currentCityId'], 1));

        return $status;
    }
}
?>