I have shipped some minimal use in an iOS app. The first issue I ran into was scrolling of the composable inside a popover view controller. I changed it to be a full screen VC, and that fixed that issue.
The other issue I have seen, only on some devices, is switching between two composables (using a segmented control and loading/unloading compose VCs) sometimes crashes. I was not able to narrow it down, and I seem to be the only one seeing this (it could be something else in my code). So I changed that scrolling compose view into a SwiftUI version and no problem.
I have maybe 3 other compose views in my app, and running very well.