Does Houdini plan to support the USDZ ARkit Physics and Interaction schema's from Apple?
Or is this something that I should invest in building the tooling for?

Schema definitions for third-party DCCs
USDZ schemas for AR [developer.apple.com]

"""
Overview
These schema definition files contain a codified version of the specification addendum defined by USDZ schemas for AR. As a developer of third-party DCC software, you enable your users to configure interactive and AR features in their 3D assets by implementing the specification and providing additional UI.

Integrate interactive and AR schemas
To recognize and validate syntax, and to participate in USD features such as transform hierarchies, incorporate the new interactive and AR schemas into your DCC by copying the schema.usda files into your USD library and rebuilding. For more information, see Generating New Schema Classes.

"""

I just wanted to followup and note that the USDZip Output Node in the OUT network creates an ARKit compatible asset as I was looking for. I look forward to testing this functionality further.

https://www.sidefx.com/docs/houdini/nodes/out/usdzip.html [www.sidefx.com]