Force Windows 11 Upgrade to Pro in OOBE

Choose language, keyboard layout, device name etc.

Once you hit the login screen, press Shift+F10 to open a command prompt.

Run this to uninstall the Home license (although might not be necessary):

slui.exe /upk

Run:

changepk.exe /ProductKey VK7JG-NPHTM-C97JM-9MPGT-3V66T

Even if there is an error, ignore it and restart.

It's now Windows 11 Professional and you can join domain etc.

From: How can I upgrade a brand new Windows 11 Home to Pro? (without leaving the out-of-box experience and without logging in with a non-corporate account) - Super User