How do I move an Entity Framework or EF Core app with Babelfish?

Hi, @light

Your question is very interesting!

I have previously enabled Babelfish.
https://dev.classmethod.jp/articles/babelfish-for-aurora-postgresql-ga/

I think you can use the same procedure to create an Aurora PostgreSQL with Babelfish enabled and specify the Aurora host in connectionStrings.
Entity Framework should issue standard SQL queries to Aurora (TDS), so I think it works unless you have a special query syntax.