Thank you all for your replies.
From the above what I get is that when my new Model Y turns up it will most probably have a rise on the left side which will light up the pavement/hedge/etc on the nearside while being flat across the rest of the beam. This is what all cars were like not so long ago!
However, we also have the situation where the California centric nature of Tesla is shown in that they have probably not considered places where RHD vehicles will be driving in LHD countries, because, well, why would they.
As Tesla becomes more multinational hopefully they will have a wider understanding of the world in which they deliver cars.