Amplify JS lib with AppSync Subscription for initial data

Currently I'm trying to figuring out how we can send initial data to UI at the time of subscription using resolvers and DynamoDB as data source but still not able to do that. Can Anyone please suggest is it possible to send initial data at the time of subscription if Yes then How?

No repository file or test is identified. Start by reviewing the AppSync subscription, resolver, and DynamoDB data-source behavior described in the issue; done means documenting whether initial data can be delivered at subscription time and, if so, the supported approach.

Written by the indexing model from the issue text.