Does profit from a contract that RH closed at 4pm from SPX go into your account?

Last minute before close SPX dropped 10 points and my put’s return shot up to $6.4k. Literally seconds before 4pm, then market closed. It shows on my homepage and in my investments tab, but not in my buying power. Does it just have to settle? I know it says the final settlement is pending, but if that was the value at close, then do they have to honor it? Will they change it?

I’ve never not closed an 0dte position before close before, so I’m unsure.