@OOPer Thank you so much! Seems so easy when a pro explains it... I am a beginner with no coding background what so ever, so I am very grateful for all the helpful people in this forums!

Yeah, same issue here... Works fine with .compositingGroup() in the canvas, and worked on physical iPhone running iOS 15.0, but after updating to 15.1 the touch overlays are back, and the initial solution not working anymore...