Did not yet hear much about that, but since he booked SpaceX and SpaceX is still in the "lets test when a tank explodes" phase for their lunar spacecraft... possible that the date slips.
I bet it won't be exactly the way he was planning on going, but I'm pretty positive considering the amount of money he's sinking into Starship development that he's going to be the first non-SpaceX astronaut to go.