It’s not over, I’m still using Apollo sideloaded. It’s actually fantastic because no ads and tracking.
It’s on GitHub and gets development still actually. You download the IPA file and Apple treats it as a developer app so it’s no problem.
You also have to get a Reddit and Imgur key and signup for a developer account on Reddit. Reddit allows developer accounts many more pull requests than user accounts so it’s able to run a 3rd party app.