The seemingly unethical but I think totally okay way:

Job hop until you find a chill job that allows a hybrid schedule, or start one and move away, asking to go remote.

Work very hard 4-5 hours a day, and the rest of the time is yours. You might actually work harder than most people staring vacantly at their monitors and sitting in meetings.

I've been looking for something like this and basically, no, not unless you want to be a freelancer or contractor. It just doesn't make sense for companies to hire at part time levels when they can just use contractors instead.

I would totally hire a part time person for 80-100 hours a month if they're highly self motivating and a GSD personality. There are also places like Holland where you can typically get a job and then request to work fewer hours (with a relative pay adjustment) and this is protected by law.

Yes there is, although it's rare

Here is what I'd do if I were you:

Build a list of all the companies you could/want to work for

Build a list of all the linkedin profiles of their HR/recruiters/talents or (co)founders for small startups(you can use phantombuster or a custom puppeteer scraper)

Find all their emails using wiza, dropcontact or a similar tool

Use a mailbox warmer for a few days/weeks to prepare your mail address to send lots of mails without getting flagged as spam

BCC all of them asking if they'd be open to hiring part-time (or use lemlist)

you can also send automated linkedin invites/messages to them

Dutch companies have this culture. More than half of the population works part-time. You might have some luck there.

Add yourself to the 'Freelancer?" thread on https://news.ycombinator.com/submitted?id=whoishiring