I discovered the UPSCALING toggle is for higher resolutions. I set my game to fullscreen mode and the toggle became available. if it doesnt then you cant run minecraft past 1080p
same problem, not sure what that means, my upscaling mode is stuck on fallback? i uploaded photo of the tick
currently im having this issue -> https://bugs.mojang.com/browse/MCPE-69651
https://youtu.be/reYIkMf7wvM
update driver. if still doing so you need to check and make sure driver is correct. only works on a gtx 2060 or better card