You are forced to use IL2CPP on mobile since the Google/Apple mandated ARM64 build is not available through Mono. (Mono itself does support ARM64, just Unity do

You are forced to use IL2CPP on mobile since the Google/Apple mandated ARM64 build is not available through Mono. (Mono itself does support ARM64, just Unity doesn't bother to port it) I recently had a bug which erroneously stripped functions in generated IL2CPP code, and I had to trace generated IL2CPP line by line, it’s so much fun.