My experiences mirror Fossy's, I've moved two children's bikes in the lockdown, okay one was a shed of an Apollo (offered free on Freecycle, gone almost immediately) but then I sold a nearly perfect Carrera children's MTB. I was getting a lot of offers, some good, some silly, some hard luck stories, and then the first buyer never paid, but on relisting it, it was gone in an hour or so. "Buy it now", a hundred pounds. I could have got 160 looking at the mails I got afterwards.
I agree with Figbat that you might have missed the absolute peak but yes, I'm sure that will still sell.