Cloud services have a real problem, they don't all have nice emulators for data or seeding. I'd love to setup a sandboxed test database automatically, and seed

Cloud services have a real problem, they don't all have nice emulators for data or seeding. I'd love to setup a sandboxed test database automatically, and seed it with random data based on that schema (and perhaps some heuristics, like intentionally breaking some entries or random incomplete data sets) and I'd like do it without incurring the cost of maintaining this fully in house. I know in some cases, like with GraphQL, I can do this somewhat easy if I use a 3rd party service, I know with something like AppSync there is some potential to run it locally via an emulator, but honesty the DX story around Cloud services is kind of crappy, and this would go a long way in solving that story.