Setting up Bidirectional relation across different post types

bidirectional-relationship.php

add_action( 'acf/save_post', 'my_acf_save_post_test' );
function my_acf_save_post_test( $post_id ) {
    if ( 'post' == get_post_type( $post_id ) ) {
        $my_related_pages = get_field( 'my_related_page', $post_id, false );
        error_log(json_encode($my_related_pages));
        foreach ( $my_related_pages as $page ) {
            // selected page
            $related_posts = get_field( 'my_related_post', $page, false );
            if(!$related_posts){
                update_field( 'my_related_post', array($post_id), $page );
                continue;
            }
            if ( ! in_array( $post_id, $related_posts ) ) {
                array_push( $related_posts, $post_id );
                update_field( 'my_related_post', $related_posts, $page );
                
            }
        }
    } elseif ( 'page' == get_post_type( $post_id ) ) {
        $my_related_pages = get_field( 'my_related_post', $post_id, false );
        error_log(json_encode($my_related_pages));
        foreach ( $my_related_pages as $page ) {
            // selected page
            $related_posts = get_field( 'my_related_page', $page, false );
            if(!$related_posts){
                update_field( 'my_related_page', array($post_id), $page );
                continue;
            }
            if ( ! in_array( $post_id, $related_posts ) ) {
                array_push( $related_posts, $post_id );
                update_field( 'my_related_page', $related_posts, $page );
                
            }
        }
    }
}