I'm not sure but I think the oobe command is specifically for windows 11 and so I don't know if it works on windows 10.
But I thought windows 10 still allowed for an offline account? Perhaps it depends on which edition you use, whether it's home or not? If you are invited to connect to your Microsoft account, is there below an option which says "sign-in options"? If you click it, there should be a way to an "offline account", is there?