yugabyte looks quite interesting in that space. From what I can tell their OSS product allows for "Row-level geo-partitioning" https://docs.yugabyte.com/preview/explore/multi-region-deplo...

I haven't used it for anything yet, so I don't know how well it works.

Cloud flare made a blog post about this. I tried to find it but I couldn’t. The general idea was that in a post GDPR world as more and more countries put legal limits on the movement of data about their citizens, it gets harder and harder to serve these users with classic web tech. However, they say, that cloudflare workers and durable objects the user data is kept in region and thus you have a clean scalable architecture without legal worries about data jurisdiction.