Custom fields not duplicating when adding translation (using Listify theme)

Hi!

I have a website using Listify theme. The theme uses custom post types for listings and stores geolocation information as custom fields.

I have set Polylang options to synchronize custom fields, but custom fields are not duplicating (or synchronizing) when i add translation to the listing.

Also have tried to add wpml-config.xml file with the custom fields secified:

<wpml-config>
    <custom-fields>
        <custom-field action="copy">geolocation_lat</custom-field>
	<custom-field action="copy">geolocation_long</custom-field>
    </custom-fields>
</wpml-config>

Also added a filter to the functions.php:

add_filter( 'pll_copy_post_metas', 'copy_post_metas' );
 
function copy_post_metas( $metas ) {
    return array_merge( $metas, array( 'geolocation_lat', 'geolocation_long' ) );
}

Unfortunatley none of the above has worked for me.

Any suggestions on how to get it done?