Yes, one of the unanswered questions.
But inquiring minds still want to know.The Tathagata (a perfectly enlightened being) exists after death.
The Tathagata does not exist after death.
The Tathagata both exists and does not exist after death.
The Tathagata neither exists nor does not exist after death.
https://en.wikipedia.org/wiki/The_unanswered_questions
Some see the practice as being futile or pointless if it's just to attain cessation, complete cessation. There was one regular member who posted here and said something like "we're wasting our time, we're striving for nothingness." Another pondered if we're nothing but lemmings, heading off the cliff (of existence).
For most people, it's probably best to just set it aside for now and see what one discovers with insight.