The additional item I left off, unfortunately, is CarPlay only outputs in stereo, not multichannel. That piece has not been added...yet. Spatial audio is different than Dolby Atmos, I think we all agree. Also, the lightning cable only has transfer rates of USB 2.0 (upto 480kbs). While they have added a usb-c port to the other end of the cable that is for increased power delivery, but does not affect the data transfer rates. I find no mention of gigabit transfers using a lightning cable in my searches.
I don't disagree that the phones should be able to handle it, but the data transfer rate of the port is the current bottleneck.
I don't disagree that the phones should be able to handle it, but the data transfer rate of the port is the current bottleneck.