Replying to both you @GillianWings and @Sunshine_G 
I agree that gaps don’t inherently mean anything bad happened, and that someone could not leave a review for any number of reasons. But since gaps do show in HO profiles (albeit only in the app), why shouldn’t they also appear in sitter profiles? I can’t see any reason for the difference, because either a sitter or HO-- as an individual-- is equally likely to leave or not leave a review for whatever reason, be it good, bad, or completely unrelated to the quality of the sit.
It’s worth noting that a string of gaps, or a gap from a someone who otherwise always leaves reviews, can potentially be a red flag. This is applicable to both the sitter and HO side. There’s some more discussion here:
It’s entirely possible that Peaches’ sitter could have had a string of gaps that would have prevented Peaches from booking. Maybe not, but there’s no way to know since sitter gaps don’t appear.