I don't know about everything else but 3bln out of that 15 were supposed to fund entire Moon mission and he burnt through that cash delivering a handful of suborbital empty metal pipes ... sorry, the last one was containing a banana to add insult to injury.
That's ridiculous. There's no extra money coming. This is a firm fixed price contract. And the original plan was 2028 before Trump changed things.
Most of the 15billion is for already delivered deliverables. (You have absolutely nothing to stand on) Blue Origin is also going to the moon and received more money for a smaller lander.
Where's their rocket?
The Moon lander contract is less than what SpaceX will make from starlink alone in 2024.