Where does the ATO or CASA say you cannot do an instrument rating renewal in a 737 simulator if you are not type rated ?
A bit of commonsense is needed here. Believe me, there is absolutely no way that you could pass an honest instrument rating in a Level 5 B737 FFS unless you had previously passed a type rating course on the aircraft and preferably had time on type. The latter not essential but you would be wasting $3000 plus even if you found an qualified IRE outside of an airline.