Could you point to where Apple claims that H2 enables lossless audio over wireless for the AirPods Max 2? I don’t see that claim on the spec sheet. What I see is this note:

“Ultra-low latency audio and Lossless Audio listening requires a wired USB‑C connection and compatible content from supported apps and services.”

So it doesn’t appear that lossless wireless is supported at all, even with Vision Pro.