Board Thread:Support Requests - Getting Technical/@comment-24753895-20200924201143/@comment-9605025-20200924202919

Well, activity for the new Feeds-based discussion features isn't shown on Special:Contributions or Special:RecentChanges because those pages are built-in MediaWiki functions and Feeds is completely separate. However, the analogous pages for the Feeds-based discussion features are Special:UserProfileActivity and Special:SocialActivity (message walls and article comments only) respectively.

That said, it appears that Special:UserProfileActivity doesn't work with anons either. As far as I am aware, article comments are the only Feeds-based discussion feature anons are allowed to use. So accounting for their activity was probably not at the top of the priority list when developing the general platform (but that is just a guess on my part).

I am not aware of this issue previously receiving attention so you may want to either post about it in the most recent release highlights thread or (or both).