All sounds pretty normal. Don't 'force' the mobility as the body will let it move when it is ready. Perhaps the physio will perform some mobilization to the small bones/joints in the wrist to assist this return to normal function.

If the radius has shortened due to the fracture (which is common) then you will lose some sense of normality in the wrist. If the pain persists (or gets worse) then it won't hurt to go have a review with the surgeon.