Mazda parts site specified trim level up to 2021, then 2022 & 2023 they switched to a blanket fitment guide that covers all cx-9s.
https://parts.mazdausa.com/p/Mazda__CX-9/CROSS-BARS/94313462/00008LN11.html
They should fit your 23 ce
Keyword should. And there's a reason why dealerships have certain nick names
But I'm kinda surprised the belt needs to be replaced so early. To me it's a pics or it didn't happen type of situation.
If you click into tk48 and look at the vehicle fitment list, you'll see it fits for all models because there are no fwd signatures. So I would say it works for AWD too.
Let them know it's a safety issue. If they can't properly diagnose and resolve, then you need to escalate and report it to NHTSA (assuming you're in the US)