Modifying Category Page header

this might work https://wordpress.stackexchange.com/questions/179585/remove-category-tag-author-from-the-archive-title

add the code into functions.php of your theme (which is already a child theme).

Thanks, Michael. That worked perfectly!

I’m not starting a new topic, because this is also about modifying the Category Page header:

Is there a way to include the current user’s name in the header?
It was “Category: Screening Room”
Thanks to Michael, it now says “Screening Room”
Is there a way to have it say “Joey’s Screening Room” for username Joey?

I have tried several solutions but can’t find the right place/method in archive.php to add the username.

(The page I need help with is still: https://teamwonderreel.online/category/ws/

based on the code of the earlier suggested https://wordpress.stackexchange.com/questions/179585/remove-category-tag-author-from-the-archive-title

try replacing that code with (only targets the category archive):

add_filter( 'get_the_archive_title', function ($title) {

    if ( is_category() ) {
		$current_user = wp_get_current_user();			   
     	if ( ($current_user instanceof WP_User) ) {      
		$title =  $current_user->display_name . '′s ' . single_cat_title( '', false );
		} else {
		$title =  single_cat_title( '', false );
		}
	}

    return $title;
});

https://codex.www.ads-software.com/Function_Reference/wp_get_current_user

Michael, sorry for the delay in responding. This works perfectly and I never could have figured it out myself! Thanks for helping me build a nicely personalized site.