It feels above-market to me, but it probably depends on the number of kids and where you are. We're paying $17/hour for daytime child care for one two-year-old in the north Atlanta suburbs. We've historically paid evening "date night" babysitters $60 for 4-5 hours, so $12-15 an hour, but that's an easier job because the kid's asleep a big portion of the time.

I don’t know, but the US is a huge country with some very poor parts and some very rich parts. It wouldn’t surprise me if it was below market rate in Silicon Valley.

Here's a survey from urbansitter.com: https://blog.urbansitter.com/2019-babysitting-rates/

$20 seems to be above-market everywhere for one kid, and everywhere except SF and NY for two kids. But it wouldn't surprise me if there's finer-grained variation - sitters probably cost more in the richer parts of a metro area than in the poorer parts of the same metro area.

Most data on the market rate predates the pandemic. Right now there is basically no childcare available.