How to enable Photoshop Neural Filters (Photoshop v22.0) *Install Steps in the Description*
Note: You don't need to download neural filters manually anywhere, they get downloaded inside Photoshop when used.
Install Nvidia Studio Drivers https://www.nvidia.com/Download/drive... (no need to restart pc)
Update Photoshop to v22.0 or later (from Adobe Cloud) (no need to restart pc)
Run Photoshop (make sure its v22.0 version, not the v21.x, see from Help/About Photoshop..) *Warning: In Start Menu this is Photoshop 2021 (yet the version code is v22.0)
If no neural filters are visible in the Filters menu, Restart Photoshop (it should now appear)
In Home view there is small "Whats New" button at bottom left, on that dialog you can click "Neural Filters", then Try Now (to test with their sample images)