If he has not provided before, then yes they can send it in any order. Please provide them quickly as they do work on his application. It is totally weird at this time. Since the biometrics is an essential part of the application, it can come at any ordef.
I got portal email on 5th June and they haven't got back to me with the credentials
How long do I have to wait?
Do they send the login credentials via email or GCkey?