OK thanks @MartinMajewski Yeah, in the example above, there's nothing actually using a binding other than $region, but a binding is required for the coordinateRegion on the Map initializer. And it's also just a plain @State property, so nothing even that fancy. Not to confuse the issue, but there are some other areas (other than with the MapKit issue above) where I've seen this same warning that make sense to me and I've eliminated the errors in my code. Here is a YouTube video that made my understanding of it a little more clear: https://www.youtube.com/watch?v=3a7tuhVpoTQ I'm going to assume for now with the MapKit example it's a bug. I just submitted it as an issue in Feedback Assistant in case that helps.