I do not remember for sure if my passwords are changed, but they may go back to the default user/password. I do know what my password is so I can get back in and I think that is how it works.
Since we just had a firmware update it may be a while before I can check. I do know I have not needed to do any factory resets.
Maximus Z790 Hero,
Intel i9-13900k
Intel AX411