Please check what happens if you select DX12 instead of DX11 by manually editing cfg file.
To do this, you need to edit usercfg.opt file and modify the line
PreferD3D12 0
Change the number 0 to 1
and save the changes.
OR
Uninstall NVIDIA app and restart PC
OR
If you need Nvidia app, optimize MSFS 2020.
OR
If Nvidia app installed go to:
c:\ProgramData\NVIDIA
delete folder named NGX