I'm surprised they did a hardware check within the app rather than just restrict the app on the iOS app store side. Surely they should've marked your phone incompatible before you wasted your time downloading the app?

I do wonder what makes older phones incompatible, though. Others are complaining about the performance, so it could be that the low amounts of RAM Apple puts in their phones is starting to catch up, or it could be as simple as them not having trained their AI models for some older phones yet.

Same experience on SE3.