"abstract century" is a terrible order ID. It doesn't look like an order ID, which can be confusing and will require more training. It's two English words, which might be difficult for non-English speakers (Uber Eats is an international service, and the restaurant staff and the courier might not share a common language). Also, what if the random two words end up being "include cutlery"?

A better set of characters and ensuring that two order numbers in the same restaurant are very different would be a much better solution.