FIrst your PCPARTPICKER is listed as "Private" so unable to see your build.
Second you can't install 2 AMD Graphics drivers at the same time. Whenever you try to install the second AMD Driver it will overwrite the current AMD driver you have installed.
If I were you I would first install the latest AMD Driver for your RX6800XT and see if MS Flight Simulator works or not from here: https://www.amd.com/en/support/graphics/amd-radeon-6000-series/amd-radeon-6800-series/amd-radeon-rx-...
If the latest has issues with the game then try installing a previous AMD Driver from here: https://www.amd.com/en/support/previous-drivers/graphics/amd-radeon-6000-series/amd-radeon-6800-seri...
If none of those previous AMD driver works than go to 3D Guru and download any driver from 11/2020 to 02/2021 from here: https://www.guru3d.com/files-categories/videocards-ati-catalyst-vista-win-7.html
The RX6800XT was released to the public on 11/18/2020 so any driver from that date to 02/2021 should be compatible ( 11/18/2020 - version 20.11.2) to (02/12/2021 - Version 21.2.2).
If I suggest that you install the last February 2021 driver version 21.2.2 for the best compatibility for your GPU card.