I accept the resurrection of Jesus as the basis of Christianity. As Paul wrote “ If Christ were not raised up your faith is useless ……we are men to be pitied” ( 1 Cor. 15 . Summary of it)
Such an event, however, is not supportable by historical evidence. He died as a criminal with no official record. His resurrection was only seen and accepted by his followers so is not in any secular history. Contemporary writers like Josephus and Tacitus comment on his living and gaining followers but not being raised.
So , I see it as a matter of faith. We “ walk by faith, not by sight “ .