Unless I am missing something, isn’t discussion about 3 phase cables irrelevant to most users? If you have a Trophy and an untethered single phase 7kwh charger at home then a 3 phase cable would give you no benefit. Are there any public or workplace untethered 3 phase chargers where having your own 3 phase cable would be helpful?
As said by others this isn't really relevant to home chargers as they I'm almost all cases will be 7kW. There are quite a number of fast chargers in other locations that are 3 phase, at people's work, and other destination chargers supermarkets etc.
I think it's both LR, SE and Trophy that get 11kW 3 phase charging, and it seems to have stuck with more recent deliveries rather than previously thought to be on early deliveries only.
Would be good to confirm what is the case. The easiest way to check is by looking at the pins on the charge port I believe.
This is three phase with pin L2&L3 present, I suspect on all LR (SE & Trophy)

This being single phase with pin L2&L3 missing, I suspect on all SE SR
