I don't think so; I know a lot of them are in charge of multiple companies, which sounds like they work a lot, but I think it signals just as much that CEO really isn't that hard of a job.

Elon is the CEO of like four or five companies I think, while also ostensibly heading a government agency. If you can have four or five full time jobs, then they are not full time jobs.

Given that, I suspect that they're able to find plenty of time for themselves.

I have not heard anyone of the superrich who stays at home on the sofa; maybe there are some rich Influencers these days who are more "consumption heavy", but what I can judge is even these guys pump out stuff on a more or less professional level, meaning they cant do it as a hobby.