How should somebody who has developed samadhi verify that rebirth occurs after death?

I am trying to understand how somebody following the dhamma is supposed to verify what the Buddha said about rebirth. In the past I've been told that once somebody has developed samadhi/calmed the mind to a great extent then they will be able to see that rebirth occurs after death. Usually samadhi helps along the path by making it easier to observe thing and see the world as it is. It's clear how this helps to see anatta/anicca/dukkha, but I do not understand how samadhi helps with seeing anything related to rebirth. I don't know what anyone would begin to observe to see rebirth. This question has a very similar title to my previous question but it is not a duplicate. In the previous question I had one idea on how someone could verify rebirth occurs after death but the answers said that my idea was incorrect. This new question is asking for other ideas on how someone can verify rebirth through experience.