[Feature request] emit a mutation to linked Appsync Apis to trigger subscriptions

[mattiLeBlanc]

I am having multiple APIS which share some of the Types, like a Client-api serving a customer app. and an admin-api offering a management dashboard. A mutation to update a Resident mutates the same record in a dynamodb, but one's mutation would not allow us to notify the other API. Except when we specifically call a mutation (trigger) on the other API.
But that then forces us to use Lambda invocations instead of a simple JS resolver.

I am actually having 4 APIs and it have them talk to each other is a bit of a nightmare. I am looking at the Appsync Event API as a single bus that all apps can subscribe too, but it does mean each mutation has to become a Lambda because I need to emit a an event on the single Event Api.

It would be sweet if you could setup triggers on a Grahpql API to emit an event to multiple other sources so I can still use a JS resolver to update my Resident for the ClienetAPI, but then my appsync api will emit the response to the other linked API's.