I do basically the same sometimes I have days were I don't work at all. You don't have to hustle your whole life away if you don't want to.

I do this as a remote 9 to 5 dev, you just need to be delivering and not tell people how much free time you have

The company I run asks employees to work 20 hours per week.

Just because something isn’t the norm doesn’t mean it’s fabricated.

That is not unusual for freelancing.