The terms of the Celebrity offer state Statement credit will appear on your billing statement within 90 days after 3/27/2022, which is the end of the promotion. It sounds as if Celebrity has chosen to review and pay everyone at the end, rather than after individual transactions.
I had in on my Platinum card also, and also had a bonus MR Points Celebrity offer double dip and I charged those back a few months ago and both posted right away like normal. I am hoping these will post after the promo is over, just feeling like this is going to become a hassle to get the credit.