Hey, Nikolas from the Prisma team here!
As of today, we indeed only support relational databases (Postgres, MySQL, SQL Server, SQLite) but we are already working on a connector for MongoDB[1] and plan to expand to more DBs in the future, here's the open issue to support DynamoDB[2].
Hopefully Prisma becomes an option for you once we support your favorite DBs!
[1]: https://www.notion.so/prismaio/Prisma-Roadmap-50766227b77946...