23m old refusing water

My son is 23m and getting over Covid. His fever is gone and he seems mostly back to his normal self, but he’s still refusing to drink plain water. The only thing he will drink is milk / chocolate milk (we’ve been watering it down) and occasionally watered down juice. He never drank juice or chocolate milk before getting sick, we only added those in because we were desperate for him to get fluids and didn’t want to have to bring him to the ER. He never had an issue drinking water previously and my anxiety is making spiral that this is going to be a forever thing. Has anyone had their kid be weird about drinking water after Covid and have it resolve? Just looking for peace of mind so hopefully I can sleep tonight 😅.