ARFoundation/ARKIT 3.0 Multi-User - How to change or update ReferencePoints/Trackables

Hi,

I'm using the ARFoundation samples(https://github.com/Unity-Technologies/arfoundation-samples).
I started off with the Scene ARCollaborationData.
With this code I'm able to create and remove ReferencePoints to an AR-environment with more tablets. Now I'm trying to scale or rotate the created objects afterwards.

I'm currently rotating in deleting a Referencepoint and adding it afterwards with a new pose(with the desired rotation). This doesn't seem like a good implementation tho.
I don't know how to handle scaling at all, since a pose doesn't have a scale or anything similar.

Are there any tutorials or a documentation for multi-user AR and specifically on how to change reference points or trackables after creating them? is this even possible?

thank you for any help or suggestions