A divorce isn’t a death sentence, it is not final. They can always get back together & maybe try to start the relationship again.
This kind of look right response and I also think it is possible. Usually when you are separated with someone and you stay with other people, you may find out the things you can not compromise and most important for you and where you see those things. So it may be in your divorced relationship that you can even work out your happiness more. Therefore, coming back is possible if the two people have found that they actually love each other and have made a mistake for not giving their relationship a chance.