Did you reach out to the seller to confirm? In my experience, if the listing has expired which happens when only one 1 item is being sold, eBay doesn’t show all the info after the sale. I try to look up old orders and this happens a lot. The sellers are usually responsive and care about their ratings so they will provide any listing clarification or even a refund before you can leave a negative review. eBay is also good with buyer protection if the sellers refuses a refund. I suspect eBay cannot change their reviews so they are giving time for the sellers to resolve any issues.
That’s always been a thing to prevent bots / new accounts created just to spam or ask basic questions without searching the sub. You will be able to comment but you need some karma to post. If you are a regular user of the sub, you’ll most likely not make a post about a basic question discussed everyday in the sub.