Be sure door and window frames can be built out relatively easily before taking this approach.
Drywall before siding.
Drain lines along with hot and cold water lines.
The only gotcha i have seen with his approach is the hammering during brick tie installation can cause cosmetic drywall texture cracking.
The tricky part can be dealing with the added thickness where siding meets windows and doors.
Any ductwork for room vents and air return.
All wiring and electrical boxes installed for wall outlets switches and light fixtures.
Then once you get the roof on and doors and windows in the house is dried in.
The proper order is.
The drywall becomes wetwall and if he has put any insulation in the wall cavities it gets soaked as well.
Framing first followed by sheathing that is usually plywood or osb followed by housewrap if you re using one followed by siding.
Our builder informed us that the insulation drywall is going up this week.
We are a little worried about this won t the insulation drywall get wet damp.
As others have said if the builder has done good work the walls are dried in before the brick is installed.
Problem is they have not finished the siding tyvek is up and there is a window on the main floor that has not been installed yet.