AppSync empty selectionSetList in the GraphQL Info Object

Hello,

It seems **selectionSetList** is always empty when running queries returning a union type.

Simplified schema example:

type Post {
id: ID!
content: String!
}

type QueryError {
message: String!
}

union QueryResult = Post | QueryError

type Query {
getPost(id: String!): QueryResult
}

Query Example:

query GetPostQuery {
getPost(id: "post-guid") {
... on Post {
id
content
}
... on QueryError {
message
}
}
}

Lambda function receives *$event.info.selectionSetList = []* for such type of queries on AWS AppSync.

Is there anything one can do to make it work?

P.S: It works correctly when running locally using **Amplify AppSyncSimulator.**

Start by reproducing the reported union-type query in AWS AppSync and inspect the Lambda event's $event.info.selectionSetList. Compare the result with Amplify AppSyncSimulator, then determine whether the empty list is expected, has a documented workaround, or requires an AWS service fix; done means recording a confirmed resolution or reproducible finding.

Written by the indexing model from the issue text.