Until I work out what I have done wrong in my app to make the tab bar appearances not work correctly in iOS 15 I have gone live with the same solution as others involving setting an appearance with a neutral color and applying it to standardappearance and scrolledgeappearance. However, I very much look forward to removing this code as the iOS 15 default appearances particularly suit my apps and I will have to do more work to find out why the app does not pick whether it is at a scroll edge or not in every situation. :) #frustrationaverted