Help with site map

Hey, I’m wondering if anyone can help me with some URLs appearing in my site map. I have a WP website using RankMath.

I made custom category pages and did a 301 redirect from the default Wordpress category pages (www.mysite. com/category/hub1).

The problem is according to the Ahrefs site audit these URLs are in my site map and should be removed.

But because I can’t access these default category pages as they are self generated I can’t seem to noindex them.

Is there any easy way to do this.

Any help would be greatly appreciated.

Chris