To add to the list: Coming from the web and being used to having a ton of control how every thing looks I found that customizing elements sometimes have surprising limitations in SwiftUI. Also be wary of trying anything UX wise which is non-conformant with the official spec.

Also xcode in general is such a bizarre IDE compared to the IDEA products or even VSCode which I felt was limiting me severely, even after making quite some effort to adjust and learn shortcuts. I also found that the screen/component preview was just so inconsistent, performance hungry and slow that I stopped using it pretty quickly. I want to like SwiftUI but it feels too rough around the edges for me so I guess I'll check back in a year.

I tried flutter after and it was SO much less painful, more/easier customizable and tooling felt heaps better.