Answer is yes according to tnis photo, or more accurately, they were already updated a few weeks ago.

So UCX = FandomDesktop? Okay. Not super intuitive, but good.

From what I have heard, UCX is the code for the unified redesign project, and if I understood correctly the term was used on Community Connect, but I don't think it appears on any official page.

Anyway for the compatability status, all the scripts/stylesheets that are broken for UCP are already marked as such, so "Unknown" means "compatible with UCP but not necessarily with FD".

Does it? Sounds like Unknown should mean... ummm... Unknown.

Blame KockaAdmiralac... but it's unknown because no one reviewed it for FD yet. Everything was already reviewed for UCP on Oasis so if it's marked as unknown it should be at least UCP-compatible.

See https://dev.fandom.com/wiki/Dev_Wiki_talk:UCP#Clarifying_Pre-UCX_Statuses