The only reason I can see paste being greyed is if nothing is in the clipboard. Have you tried CTRL+C to copy and CTRL+V to paste? CTRL+X is cut iirc if files are on different physical drives you could drag and drop or you could add copy too to the context menu
---------- Post added at 07:55 ---------- Previous post was at 07:52 ----------
There is a reg file on this site that adds copy to folder and move to folder to context menu
https://www.partitionwizard.com/part...-in-win11.html
Not checked but you can view the reg file in notepad to make sure it is innocent. Or you cam manually add the entries