According the the pdf factsheet linked in this thread they were just existing pieces in new colors. So the transparent parts for the lights and I imagine LEGO doesn't sell technic in Bugatti Blue.
They sell the smaller version of this car, in the same colors [1]. But many pieces are not available in those colors, e.g. I see a lot of the 3x1 cross-blocks [2] in light azure, which is not in any other set.
[1] https://shop.lego.com/en-ES/Bugatti-Chiron-42083 [2] https://ali1994.brickowl.com/store/lego-technic-cross-block-...