May I ask if there is a complete source code project for this instructional video that needs to be learned.
Work with Reality Composer Pro content in Xcode
In RCP3 we are deepening the integration between Reality Composer Pro 3 and Xcode. Now, instead of a Swift Package, you can link a full Xcode project inside your RCP3 project.
This allows you to export your scenes, build and run your Xcode project directly from RCP3, without having to have Xcode even open. Physical devices and Simulators supported for iOS, iPadOS, tvOS, macOS and visionOS.
This integration can also be used to create Custom Components, Custom Actions and Custom Script Graph nodes to run your Swift code inside the Editor.
The samples used the WWDC 26 videos like Chaparral Village and Squirrel are examples that take advantage of that integration.