Divine power means that a genuinely possible state must not be declared impossible when Allah is able to create it. Belief in questioning, punishment, and bliss combines that possibility with the relevant transmitted evidence.
Yet the power to do something does not by itself prove that it is actually done. The occurrence of these particular barzakh states is grounded in Qurʾanic and prophetic reports.
The disciplined conclusion is threefold: affirm the central claims supported by the texts; give rational replies only where sound; and avoid unwarranted certainty about the hidden mechanisms and disputed incidental details.