This app is fetching data from a SpaceX API made in GraphQL, accessible in https://api.spacex.land/graphql/. More documentation can be found here.
I'm using Apollo to manage the GraphQL business on the app side, installed with Swift Package Manager.
The setup not very complicated, but I faced some tricky steps as it was new to me.
You should follow the iOS setup guide from Apollo's official documentation, especially for the code generation script.