We are listening to FlexMatch notifications using SNS to Lambda and writing session info to a DynamoDB table. Our game runs on iOS through Unity and our backend exposes a REST API. We currently have the client poll our API after starting matchmaking but we want to switch to some kind of a push mechanism.
What is a good AWS based solution for pushing matchmaking updates to the client? Looks like AppSync has some kind of a pub-sub tech but might require adapting to a GraphQL paradigm & writing a .NET wrapper to the AppSync iOS library. Maybe APNs with silent notifications through SNS? Is APNs reliable enough for anyone’s experience?