Columns on archive page for custom post types

Hello!

I wanted to display my custom post types in columns on the archive page. I tried putting this code that I found on this page: https://docs.generatepress.com/article/using-columns-in-the-blog/

add_filter( 'generate_blog_columns','tu_portfolio_columns' );
function tu_portfolio_columns( $columns ) {
    if ( is_post_type_archive( 'podcast' ) ) {
        return true;
    }

    return $columns;
}

But it didn't work.

Then I found this code on this support post: https://generatepress.com/forums/topic/cant-divide-custom-post-types-in-columns/#post-1707854

add_filter( 'generate_blog_columns', function( $columns ) {
    if ( 'podcast' === get_post_type() && ! is_singular() ) {
        return true;
    }

    return $columns;
} );

And that worked. I'm wondering what's going on since the first code from the KB article seems like it should have worked. If it works for me, is it fine to keep the second code?

Thanks!