I submitted a review on our sitter, but it didn't show up. Where can I go to do it again?

There isn't a place to re-do a review but their support people can see the review and edit it from the back-end. You can call them to see if they know what is going on.

Call Rover support @ [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team] and they can assist you