If you are new to GraphQL Schema Stitching, I can recommend the On.NET show with Michael Staib, one of the creators of Hot Chocolate.
With Schema stitching, developers can create a unified GraphQL schema from multiple underlying GraphQL APIs. This gives us the benefit of reducing multiple data queries for our data in a single request from one schema. In this episode, Jeremy chats with the author of Hot Chocolate, Michael Staib, about how .NET developers can implement GraphQL schema stitching with Hot Chocolate.