I would like to know which api can be used to complete the creation of a 3D scene (e.g. a room), it does not seem to provide some more ways now, looking forward to your answer
to make a 3D scene，what should I do，how can I use lidar well
The ARKit Scene Reconstruction API seems a good fit for the use case you are describing. I recommend that you take a look at the Visualizing and Interacting with a Reconstructed Scene sample project.
Are you looking to recreate a 3D model of the room? You could use RealityKit’s Object Capture APIs for that use case.