Cool. Thank you for that. I've got through the SwiftUI tutorials and stuff, but I've never tried to make a real project that mixed both approaches, so I had no idea about UIViewRepresentable, etc.

I think that adds to my point that SwiftUI isn't something that's very amenable to "just use it where it's appropriate", or "gradually try it out by migrating a small part of your project", etc. It sounds like you have to commit to "this is a SwiftUI app now, and we can integrate with old stuff if/where/when we need to".