His point is about the rear lights. If in the US they may need to install another set of secondary lights for when the trunk is open, then there are still 4 parts.
BMW iX for example has a second set of taillights inside to meet US regulations:
However, in Highland it appears they replaced the two bottom reflectors with lights, so that may meet the requirements, although it's not clear if it's mounted high enough.
I already took care of that myself...lol