If you trying to query the post object field to between 2 CPT's. This condition checks if the repeater is empty or not.

Conditionally_display CPT_based_on_post_object_field.php

// Add the function to advanced scripts (or code snippet) 
// Create a condition in the builder to the section where you want to hide
// Select dynamic data -> php function -> “Check_CPT_Repeater”
// Inside the arguments section add your "cpt_name" and post object "acf_field" 
// Set dynamic data == 0 (to hide if no results are returned)

function Check_CPT_Repeater( $cpt_name, $acf_field ){
    
    //WP_Query arguments
    $args = array(
        'post_type'     => array( $cpt_name ),
        'meta_query'    => array(
            array(
                'key'     => $acf_field,
                'value'   => get_the_ID(),
                'compare' => 'LIKE',
            ),
        ),
    );

    // The Query
    $query = new WP_Query( $args );

    if ( ! ( $query->have_posts() ) ) {
      return 1;
    } else {
        return 0;
    }

}