Collectively there are 100s of strings open across Reddit, Stack Overflow, etc asking for a clean way to export saved places on Google Maps, but other than Takeout (which for the average user is quite complex), there isn't really anything that works well.

There's ways to hack together a scraper that can go through and grab everything, but it's still quite messy. I think Google is making it hard on purpose in order to use this as their "moat".