Where did our customization from the flights go?

During the September/October flights, I used credits to purchase the battle pass, and a bunch of customization items, but when i started up Halo Infinite, i had none of them. I feel like we should have kept those things we got back in october since we only had like, 4 days to enjoy those items.

Anybody else have this issue?

They said time and time again that nothing will carry over.