Bad actor goes to super secret page while working on 'fixing' and issue for the user. They then get the 2 digit request code and ask the user to input it to 'resolve' the issue.
Mostly the same as any other 2fa social engineering attack I guess, but the users phone does display what the code is for on the screen which could help.... But if your falling for it probably not.
From a practical PoV - most people have their phone on them all the time. A work phone or a physical token can (and will) get forgotten, a personal phone much less.