For posterity: This can work by re-running a sceneDepth enabled WorldTrackingConfiguration after the RoomPlanSession's didStart delegate method is invoked

So the code above isn't explicitly using completionHandlers for the URL tasks Is the expectation that await is essentially a "completionHandler" under the hood, and the problem is asynchronously interacting with background tasks from your app entirely? You can't use async/await for BG tasks and you must only interact with a given BG task via the delegate?