As the speaker mentions, the documentation contains source code for the sample app. But when I went there I just found the sample code from wwdc 2021. Is the code available yet?
Where can I find the source code for this session?
it hasn't been released as of today. but I am sure once it is you can find it under https://developer.apple.com/sample-code/wwdc/2023/ (I hope :))
The sample project appears to now be available here: Scanning Objects Using Object Capture, as can be found in the RealityKit documentation section of the Apple Developer website.