Hm, I think this might be some update related issue, it just happened to me too, with a 3600TI Gigabyte. Just came here to make a post. I did have an issue 1 or 2 days ago, when I wake up and tried to use the PC it was extremely laggy, even for a text file. So I restarted and things were fine. Also today while playing ARK suddenly I went to 10-12 FPS for no reason. Tho that might be Ark related, other people had the same issue. That's how I ended up checking the Performance tab, wanted to see on my second display what happens when playing.
The GPU tab worked before, because I used it, and it was even selected on the Performance tab today, but empty. Selecting the CPU didn't allow me to go back to it tho.
GPU-Z and dxdiag see the GPU fine. Also I don't have an integrated GPU. Furmark detects no issues, no temperature spikes no nothing, I let it run while I made an omlete (du fromage) and ate it. I also did a sfc /scannow right after I did a DISM.exe /Online /Cleanup-image /Restorehealth to check for any OS related issue. Then did a DDU and tried the previous driver too.
In the last days I did a GPU drivers update and a Windows one, so both could be the culprits, since I did DDU, I'd say it's the windows update.
If anyone finds a solution, I'd be happy to use it lol.
DXdiag WDDM 2.7
https://prnt.sc/v3YmhoRX0URs
GPUz
https://gpuz.techpowerup.com/22/05/03/mfv.png
Hm, gonna do a BIOS update, if there is any, just for the sake of it.
EDIT: Updating Bios to the latest version and 2 other MB related things that got updates since the last time I checked didn't help. Still no GPU in the Performance tab, 0% GPU usage in the Processes. GPU-z shows everything fine.
PC:
MB: B550 Gaming Plus MS-7C56
Processor: 5900x
RAM: G.Skill Ripjaws V Black 2x16 32GB DDR4 3600MHz CL16
GPU: 3060TI
NO iGPU
PSU: Seasonic Focus+, Gold, 850w