Should we just let them cry it out?

The best thing to do is deal with the 5year old first both my 2 was the same just put him up and leave them to cry he will keep getting up put just put him back but don’t talk to him the first few nights will be hard ut as long as you keep up with it he will get to understand he has to go to bed by himself and it is hard and I know how you feel my 2 have the loudest cry’s ever. I’M not sure about your 2year old this is not really a good way for her because of her surgery but give it a go with the 5year old like I said it is hard but it pay’s of in the end good luck and I hope it works out for you.

what you do to the 1 you must do to the other. if the 2 year old is now healed and able to go into her own room according to the doctor then you should deal with them both at once otherwise you going to get asked by the boy why his sister gets more attention and all, and trust me that is worse in the long run… but dont force it, just try off slow and slowly progress, dont force anything

Deal with the 5 year old and give the 2 year old the time she needs to heal.

Well, I won’t pretend to be an expert, but personally I think it would be best to deal with the five-year-old first. Once he is used to sleeping in the room by himself, I think it will be a lot easier to deal with the two-year-old. Good Luck!!