I am trying to create a social network app. When I started I had proper domain models for Feeds, Activities, Author etc. with all the behaviour encapsulated within the Objects. I had the luxury of ef-core for easy change tracking and infrastructure abstraction.
But then I started using GetStream.io to get feeds for my application. And since then my application is back to having all the logic in Service layer.
Can someone suggest me how to improve this and use DDD in this context.