I cannot find the option, how to activate the visualisation of the Objecttarget - Could in Unity (2021.2.9f).
"After that, simply enable the point cloud visualization from the corresponding
ObjectTrackable and align the
Firetruck Transform to match."
The ObjectTrackable's inspector will show a list of targets contained in the parent ObjectTracker's assigned target collection. There you can toggle the point cloud preview with the button in a target's thumbnail like shown in the image below (the image is from the Expert Edition Unity SDK).
possible to toggle the point cloud preview runtime ? if using custom url ?
No, that's not supported at the moment.