We have a multi-region single-write-leader Postgres offering now, but "databases" means lots of things to lots of people, and the platform strategy is to build durable storage primitives that work for as many different databases as possible. People run things like Cockroach here, and edge deployment also makes SQLite especially interesting.
a bit off topic, but a big struggle that is growing related to data and databases; managing data residency. I've not found an easy way to handle this and countries seem to be passing more and more laws... it's tough for global applications!