I’m under the belief that the OEM T6.1’s don’t have the near side ‘up kick’ that the OEM T6 LEDs do, meaning they don’t need a travel-mode option because the absence of the up kick means LHD traffic won’t be blinded.
So I guess this means that T6.1 LEDs would not be ‘handed’ as such, but T6 LEDs are - at least for UK MOT requirements anyhow.
However, a T6.1 LED retrofit - whether facelift or OEM - doesn’t sound feasible due to them operating on a different platform.