Oh, which Iceman comics are you reading? I think I still have Marvel unlimited but i haven't looked at it for a while and I am not very current on X-stuff. I went on a classic New Mutants kick for a while last fall and wrote some fic for that and for All-New Wolverine. Most of the XMen fandom I'm familiar with these days is around podcasts -- Jay & Miles X-Plain the X-Men and Battle of the Atom/ Xavier Files/Comics XF. They have various twitter/discord/tumblr presences too.

And there is some good fanwork being done around Mandalorian for sure!

I'm currently really obsessed with The Raven Cycle by Maggie Stiefvater, which is a book series about teenagers in rural Virginia who get involved with lots of weird magic and also trying to date each other, which has really good canon m/m and m/f ships and a pretty active but not overwhelming fanfic and fanart community. So that's eaten my brain lately.