Facebook, Can't sell on Buy/Sell pages

Hello

I am on a few Buy/Sell pages on Facebook. 3 weeks ago I posted an item for sale, which sold. I have gone to list another item but I no longer have the option to sell on any of the selling pages (I can write a post, but not list an item for sale)

I can list an item on the general marketplace, but that doesn't give me the option to also post on Buy/Sell pages.

Does anyone know why the selling option would disappear on these pages? (My partner can sell on the same pages on her profile, so it's me not them)