I think it's just either..
1. They find your information quite suspicious
2. It's the holidays, and that Bitcoin interest from the masses have been slowly rising since the recent price rises hence there might be a huge backlog of user registrations that they need to go through.
I'm betting on the 2nd. You can feel free to use other platforms though, I'm personally for peer-to-peer no-KYC platforms like HodlHodl[1] and Bisq[2]. Just make sure to transact with people with good reputation.

[1]
https://hodlhodl.com/[2]
https://bisq.network/I'm leaning towards the second one. I'm fully transparent with the information I gave.