I can answer one of your questions. Yes, it is normal to have medical and biometric requests sent at the same time. As for questions one & two, from what I’ve seen the passport stamping should come later, that’s not the next step. But, I’m really new to this so I’m unsure how that works everywhere. Everyone has a different case.
For your last question the typical timeline is AOR1, Biometrics, Medical, Sponsor Approval, File moves to VO, AOR2, BGC, Decision Made, PPR, COPR.... it can also happen in a different order for different people.
Hopefully someone else can clarify for you. Good luck.