4yr old check and Immunisations

It's been a while and it seems to have changed since DS1. It used to be the immunisations at the GP and we didn't have the 4ry old assessment as we had the 3.5yr old assessment and would only need to go back if I had any concerns, which I didn't.

I understand the government had introduced a new Medicare Item number a little while ago for GP's for this particular assessment.

I have just booked DS2 in for his 4yr old check and immunisations. They explained he sees a nurse first for his 4yr old check and then the GP for his immunisations.
After any feedback from someone who has gone through this recently.
What did the Nurse do..did they just check what he can do, weight and height? The appointment with the nurse is for about 45mins-1hr so I am assuming it's pretty thorough.

Thanks :)