Don't forget that M1 Macs will be able to run iOS apps natively. (I'll be taking this route since the apps would be native.)
So from a programmers perspective:
1) Use an M1 to adapt the app to work better on macOS? It looks like running the apps natively on a M1 equipped Mac still has some teething issues in regards to user interface (
start around 4:15 into the video)
2) Instead of an emulator? I guess...
In the end I think you still need an iPhone/iPad to actually test your applications and the B4i-Bridge makes that pretty simple