I use PieFed. Filter lists are one feature and here I am commenting on user/moderator QoL feature anemic Lemmy. I see absolutely nothing about US politics unless the title doesn’t mention what I’ve blacklisted. Still cuts down on almost all of it except meme communities. I try to join meme communities not hosted on American centric instances instead.
A little bit is okay. I just don’t want US centric posts to be the majority of what I see as a Canadian. It’s not my country.
I use FreshRSS for news/international news and my mental health is better for it since I don’t look at it constantly like my forums addiction.
There’s no dedicated app, true. I find adding piefed.ca as an app via Firefox (Fennec) to be good enough, but there’s two issues I have right now. One is can’t sort by x amount of time for Top posts in the community although according to their repo that’s in the next update, just the front page for now. The other is this comment box. For some reason the top bar of useful tools is missing unless I go to edit the same comment after posting it. Weird. Might be a bug.
Haven’t tried Interstellar yet personally.
Anyways, hope your post nets you some useful options. Hadn’t considered using Wikipedia for that, maybe I can add it to my RSS feeds too somehow.