Filter for using ACF Repeater Field on Meta Query

functions.php

<?php

/**
 * Filter ACF Meta so repeater fields can be used in meta_query
 * Here 'repeater_field' is the repeater field name
 */

function cts_filter_acf_meta( $where ) {
    $where = str_replace( "meta_key = 'repeater_field_$", "meta_key LIKE 'repeater_field_%", $where);
    return $where;
}

$args[ 'meta_query' ] = array(
    array(
        'key' => 'repeater_field_$_repeater_sub_field', // Format: repeater_field + _ + $ + _ + repeater_sub_field
        'value' => true,
        'compare' => '='
    )
);