Oh duh, you did say that. 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, or message one of the app’s developers for a version that is compatible.

The dev for Arctic has been pretty responsive and may be willing to help you out.

Maybe Voyager’s web app?

https://wefwef.app/

I think a better preface would be “I was going to say a joke about the postal service… But it always has a poor delivery.”