That's prior art if there ever was prior art. It's just unicode U+1D54F

BMW doesn't seem to use that specific X anywhere else for any of their EV lineup. Even the back of the car uses a normal "X" character.

I think it's some mandate to give their car models some kind of "signature" headlight design.

BMW did have the _iconic_ "halo angel eye" headlights in the mid-2000s - the most iconic headlight signature at least in my memory. So your point would make sense.

Those were often copied by enthusiasts and "ported" to other cars via aftermarket headlights.

sure, but no other unicode has a multi-million dollar branding campaign behind it ;)

Xitter? It used to be called Twitter, but the T crossbeam came loose and down.. sorry

It's not like they're manji headlights