That thought assumes there is something after, some part of us that can discern what is happening after death. It is a subtle way of saying you expect there to be life after death since it assumes the ability to perceive it. Better to just say it than be coy. More precisely we will only know if there is life after death if in fact there is life after death.
That is false, and so we will never know. We will never have confirmatory info. We will be dead. We will have no perception, no knowledge or sense of it. We will know even less after death about what is happening after death than we do now.
Sorry.
We will just be a cold rotten piece of meat for a while as others bury us. Then bone. Finally, dust.