The only other thing I could think of is going to the way back machine and getting one of the earlier apps like Mlem or Memmy
Unfortunately, this is unlikely to work because lemm.ee is using a much newer Lemmy version than such versions would be designed for. Newer Lemmy versions introduced breaking changes that caused many older clients to stop working.
Tthe oldest iOS version that the oldest version of Mlem supports is iOS 16, and for Memmy I seem to remember that it's iOS 13 (though I can't find a reference to that right now). So I don't think either would be viable for OP. Arctic currently supports iOS 15 and later; I'm not familiar with whether it supported older versions in the past.
That's a good idea - we'll see if we can get this fixed for the next TestFlight version π