

@see-otter See my post above, may help - it sorted it out for me.
@victuskristus
Try the below - worked for me
Since the NVidia option isn't appearing, use Windows 10's alternative.
https://www.howtogeek.com/351522/how-to-choose-which-gpu-a-game-uses-on-windows-10/
Right-click the desktop > open display settings
select graphics settings
"choose an app tp set preference" > dropdown select "classic app"
Browse for game/ app .exe file (it'll be added as a thumbnail with the options and remove buttons
click options > high performance