Change page name in admin list

You can use the_title hook to change the title of the post in the admin, something like this

add_filter( 'the_title', 'custom_post_title', 10, 2 );

function custom_post_title( $title, $post_id ) {

    // Return early if not in the admin
    if ( !is_admin() )
        return $title;

    $post_type = get_post_type( $post_id );

    // You only need to change the title for pages
    if ( 'page' !== $post_type )
        return $title;

    $custom_title = get_field( 'your_custom_title_acf_key', $post_id );

    // If custom title is present, display it instead of original
    if ( $custom_title ) {
        $title = $custom_title;
    }

    return $title;
}