Came back here to share that, for me, as of today, I'm no longer experiencing this issue. I'm able to scroll down my feed and have it load new posts, and I can once again access the 'all' feed. Unsure if the app updated automatically. I've done absolutely nothing to resolve the issue and made no changes to my account. No Android updates between my last post and now. Maybe it was a backend issue with the instance I'm on (feddit.nl)?

At any rate, wanted to share. Hopefully yours clears up similarly.