I have a left-hand steered Doblo, and before the pandemic i planned to visit the UK and Ireland this year. So, i investigated the plot and found out that it is not possible to ajust a right side beamer system to driving on the left by adjusting:
So, i doubt that that is possible the other way round.
You'll have to tape it. BTW: The one pond stuff you can buy on the ferry is simply unusable. You better get your van in front of a wall and tape the asymmetrical dipped beam away yourself by trial and error.