Changing my UID (on OS Ventura) for NFS mounts

I've just bought an M2 MB Air to replaced my aging intel macbook. I've got a home server running Ubuntu 22.04 and if provides NFSv4 mounts. My UID under Ubuntu is 1000. When I tryed chaning my UID on my M2 machine it had a meltdown. It wouldnt let me access anything and kept telling me that it couldnt verify icloud etc. I assume that this is becase the UIDs of some of the folders in ~/Library were still set to 501 (when I tried to chnage them to 1000 I got permission refused errors). This works fine on my old intel machine. I ended up having to erase and reinstall on the M2 machine (and it was hard work to get this to happen -- a few times I would get errors trying to erase and reinstall). I assume that Ventura on an M2 locks the UIDs of certain folders as an extra security? Is it possible to change your UID on an M2 Mac (setting up Kerbros on a home network seems overkill).