Have you logged on to your Rover.com sitter dashboard recently and seen the box marked "confirm availability"? (As in the below screenshot).
It's a best practice to confirm your availability at least every two weeks - not only will it help you stand out in search, but it also helps you get requests that you're more likely to accept so you don't spend time sorting through requests you can't accomodate. Read more about this calendar feature here.
This is how your profile will appear to owners in search once you confirm your availability:
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