Question Questions about upgrading to Windows 11 Pro from Home

[Dave3000]

Does the upgrade option to Windows 11 Pro from Home replace your Windows 11 Home key with a Windows 11 Pro key or does it convert the Home key to a Pro key (same key but now recognized as a Pro key)? Will retail Windows 11 Pro through the upgrade from Home option have all the benefits of the retail full version of Windows 11 Pro (transfer between PC's, still usable after a motherboard replacement on the new motherboard)?