Thee are plenty of exclusive skins too, I have quite a few for ships and of course the black & Orange suit skins from the Odyssey pre-order.Aren't the Cobra Mk IVs similar, in that only certain Kickstart CMDRs can ever own them? Though they can't be sold on, the "kudos" or status symbol effect is there.
They are similar in the sense that if the right to apply them in-game could be passed onto another game owner they could be considered NFTs but they aren't unique to the individual (I believe some ship paints are) but might be considered an appreciating or desirable asset because they cannot simply be bought from the shop.
But the NFTs people are talking about are a different thing, each individual one is unique (like a car number plate).