I did notice one thing that did increase the speed...
Only with the 980 Pro installed, go into Samsung Magician, Performance, and turn on Full Power Mode (only supported by the 980 and 980 Pro). After doing that and reboot, the Random Wite speeds did get up to 500-600MBs. Still less than the 750-850 that it got in Win 10, but an improvement over the 200 it was getting in Win 11.
I have a Lenovo Yoga 920 laptop with a Samsung NVMe SSD, but it is not a 970 nor a 980, I will check that out too to see the difference with Window 10 versus Windows 11.
I just saw that it uses the same drivers used by the Hynix, but I think it is slower with writes overall compared to the Hynix. I now have both Win 10 & Win 11 results here.
This is the Lenovo Yoga 920 with Windows 10 19043.1165:
Here is the same machine with Windows 11 22000.160:
An the drivers: