No improvement at all? Did you ensure that OpenXR is the runtime in use?
You can check this in the OpenXR Tools for Windows Mixed Reality app (that you hopefully downloaded from the Microsoft Store?)
On the OpenXR Runtime tab, it should show:
Runtime manifest: C:\Program Files\Oculus\Support\oculus-runtime\oculus-openxr_64.json
Also, in the Oculus app, go to Settings and then the General tab - it should OpenXR runtime as the active OpenXR runtime?
Ensure that your resolution is set to the maximum and personally I use 72Hz here.
If all is well, you have to be in VR to be able to use the OpenXR Toolkit - the default is to use CTRL+F2 to open it, then you navigate around using a combination of CTRL + F1, F2 and F3.
The OpenXR runtime on its own will give more FPS than the standard Oculus one.
The Toolkit then allows you to tweak. CAS sharpening in particular seems to make things a lot clearer for me, I run this at 85%, I also use the in game AMD sharpening at 100.
I also use Oculus Tray Tool as previously mentioned, I have that set Default Super Sampling to 1.3, Quest Link settings are Distortion Curvature Low, Encode Resolution 3648, Encode Bitrate 500, Adaptive Dynamic Bitrate Disabled, Sharpening Enabled.
Anisotropic filtering is disabled in game as I have this set at 16 in the Nvidia Control Panel for MSFS, texture Anti-Aliasing in game is also disabled.