Plus you’re trading RN problems for gradle and integration problems on iOS.

Well, it assumes the model is.

KMP can be seen as a token optimization at this point. Business logic is shared and doesn't have to be rewritten in Swift.

Yes, that's fair. I'd argue, though, that the training required to get your team up and running should be fairly minimal - Kotlin is a very easy language to pick up, especially for people coming from TS - and will pay off dividends in the medium to long term.