Review yes, change no. Admin has already asked for public opinion on this, so review has already begun actually.
But if you think UN rescheduling will be the cause of full legalization, you don’t understand American politics. America can bend and break those treaties for as long as they like, with basically zero consequences. UN action may apply some pressure in the court of public opinion, just like Canadian action. But legalization, when it, happens, will be a a purely political/self-interested maneuver on part of US. Could take years regardless of what anyone else does.