photoshop 2021 v22.5.1 not detecting gpu

It may help if we could see your Photoshop System Info. Launch Photoshop, and select Help >System Info...and copy/paste the text in a reply.

Then, as I said, I guess I was wrong g 😉

Hope someone else throws some help your way.

Good luck, from my experience it's a never ending battle at5be moment, tying to keep Ps running with its upgrades and, in my case, Win 11 transition and upgrades. 

but what if i tould that i have another pc i5 4eme gn 8 gb ram no gpu and it running photoshop 2021 v 21 without any problem from a year now..and still working normally

I could be wrong, but I fear you are treading the path many of us have recently taken. That is your hardware is now out of spec. 

I also had an i7 with a working GPU, but then along came one Photoshop revision too much 😞

Thus I now have a new PC with the latest i9, a GPU with 12GB and 64GB of ram. But less money in my pocket!