Support Sidecar on macOS (using an iPad as a second screen or tablet)
Apple introduced Sidecar on recent version of macOS. If GIMP is allowed to make use of this feature editors would be allowed to use iPad as second screen to preview and using Apple Pencil as assistant during image manipulation.
See: https://www.apple.com/macos/catalina/docs/Sidecar_Tech_Brief_Oct_2019.pdf