https://neon.tech/docs/extensions/pgvector
https://github.com/pgvector/pgvector/issues/409#issuecomment...
But if Postgres wins we all win!
The closest I can see is the VSS extension[1] for Sqlite.
[1]: https://github.com/asg017/sqlite-vss
https://neon.tech/docs/extensions/pgvector