I was wondering if you found a solution since your reply here - it seems like I have the exact same issues, tried to fix them with my limited tech knowledge, but the lag is there and it's driving me nuts. :(
Thank you
I have the same issue, although it doesn't restrict itself to office apps. I never had this problem with Windows 10 using exactly the same hardware and software install (drivers, may be newer though).
For me, and what is more frustrating, is that my keyboard locks up intermittently. Sometimes it will lock up for a second or two and then catch up, but other times, it just stops responding for 10 seconds or more and all input is lost. Nothing works with the keyboard when this happens but the mouse still does, so the receiver itself is working fine. It doesn't appear to be an issue with the keyboard. Both the mouse and keyboard are Logitech and both are using the same receiver, so I don't think it is a Logitech problem either.
Something about Windows 11 is behaving differently from Windows 10 (with regard to stutter/lag), but tracking this down the root cause has not been easy. One difference in Win11 configuration vs my previous Win10 is that I am using Edge as my primary browser.