[fritsch]

On these AMLogic based boxes, you only get a single resolution and refresh rate in the white list. (...)

Auto Frame Rate Switching works on both Xiaomi Mi Box 3 (MDZ-16-AB) and Xiaomi Mi Box S (MDZ-22-AB) ...

both my Verizon Stream TV and CCTGV show a single resolution and refresh rate, 1080p59

That's bad for you - but has nothing, absolutely nothing to do with the state of Refresh-Rate switching in kodi in general and on Android especially. FireTV 4K, FireTV Cube supports Refreshrate and resolution switching and you get a long list of resolutions in kodi. I have no idea why you generalize your statements, while choosing to non-state-of-the-art boxes to prove your assumption ... it makes no sense.

Refreshrate switching works on every device that implements the official Android API to do so - and guess what - kodi will then work with those devices. There is not a single Shield specific code line in kodi.