Columns in custom post type archive

I am trying to add columns to a custom post type archive that has been create as a GP content template and displayed conditionally in the concert archive.

//Add columns to concert archive
add_filter( 'generate_concert_columns', function( $columns ) {
    if ( is_post_type_archive( 'concert' ) ) {
        return true;
    }

    return $columns;
} );

//Set concert archive columns to 2
add_filter( 'generate_blog_get_column_count','gm_concert_column_count' );
function gm_concert_column_count( $count  ) {
    if ( is_post_type_archive( 'concert' ) ) {
         return 50;
    }

    return $count;
}

I am not sure why I don’t get the columns in the front end, though, code should be correct, right?