Is Postgres sharding available on Aurora (AWS)
From @nathanlong's comment to my question:


  On Sep 25, 2018, they announced "Amazon Aurora with PostgreSQL Compatibility Supports PostgreSQL 10" - https://aws.amazon.com/about-aws/whats-new/2018/09/amazon-aurora-postgresql-compatibility-supports-postgresql104/. They explicitly mentioned "native table partitioning", though there are features in PosgreSQL 11 that presumably are not included; see https://pgdash.io/blog/postgres-11-sharding.html.