This is a very exciting feature in 26.4 beta. But from the document, it seems can only integrate with NVIDIA CloudXR™ SDK.
I'm wondering if it's possible to use this tool to stream immersive video from Mac to Vision Pro?
Foveated Streaming - Can I stream Immersive Video from Mac
Unfortunately CloudXR only supports Windows and Linux.
On the bright side, Apple's FoveatedStreaming framework seems like it is agnostic of the streaming framework, so other trusted vendors could potentially partner with them to get the appropriate entitlements for the QR code scanning & eye tracking.