With Windows 11 the two big OS features you can disable to increase performance on your system is Core Isolation Memory Integrity and Virtual Machine Platform.
Disabling core isolation DOES open you up to certain security attack vectors and can make your machine more vulnerable, please read the feature screen to see why and research it before deciding to shut it off.
To disable core isolation just type core isolation in the search bar, it'll appear in the results and then click it. On that page is an area called Memory Integrity. Turn if off.
To disable VMP do the following:
Type in Windows search "windows features" there should be a result that says "Turn Windows Features on or off" (or something similar). Click it and in the window that opens look for "Virtual Machine Platform" and shut it off.