for those that are still interested in some sort of upscaling on AMD cards.
use the HYPR-RX feature that got added in the recent update.
Displays don’t have ghosting either with it, better than nothing.
Mind tho, it’s not as good as fsr 2.2 or dlss
First open adrenaline software:
activate the profile
Go into your gaming tab and open MSFS profile and set sharpening to around 50% (preference)
Enable anti lag cuz why not 
After that just set your resolution in-sim (not render slider) below any of your native resolutions.