Thank you. I've tried changing the displayScale value but it doesn't seem to have any effect, both on macOS and iOS/iPadOS, so I'll explore the RealityRenderer alternative in more depth.

Thanks for the link. I think I'll keep using ARView and stick to AppKit/UIKit, because RealityView has additional limitations, such as not being able to use DebugOptions like with ARView. (I used .showsStatistics in SCNView all the time). Oh, I miss SceneKit so much... :-)

Thank you! That post explains the workflow perfectly!