I think I have a similar issue with the Remitly app. I had been using the Remitly app on GOS for years without issue. A few weeks ago I could not update it anymore, the Play Store says: "This app won't work for your device", and I am unable to install it from there.
I was able to install Remitly using Aurora Store though. The app works fine. Someone mentioned in a different thread, or prob Reddit, that the issue might be Play Integrity related.