Hello,

I was wondering: is there any way to enable filtering for third-party columns?

Here is my column for the post type fiche.

function gpc_fiche_columns( $columns ) {
    $columns['rubrique'] = __( 'Rubrique', 'gpc' );
    return $columns;
}
add_filter( 'manage_fiche_posts_columns', 'gpc_fiche_columns' );

function gpc_fiche_column( $column, $post_id ) {
    $theme = get_field( 'fiche-attachment', $post_id );
    $rubrique = get_field( 'theme-attachment', $theme );

    if ( $column === 'rubrique' && !empty ( $rubrique ) ) : ?>
        <a href="<?= get_edit_post_link( $rubrique ); ?>">
            <?= get_the_title( $rubrique ); ?>
        </a>
    <?php endif;
}
add_action( 'manage_fiche_posts_custom_column', 'gpc_fiche_column', 10, 2 );

Thank you.