I have to wonder how this will impact their partnership with Motorola. Presumably, Motorola will have more difficulty if they're found not to be complying with relevant law...
I hope GrapheneOS isn't completely banking on their partnership succeeding. If Motorola devices ever became the only devices that GrapheneOS works on, and it's being done with Motorola's blessing, then it could be more easily legislated out of existence.
I wholeheartedly support GrapheneOS but, because of that, I very much hope they don't box themselves into a corner that's then easy to 'wall off'.
Having said that, the hardware being restricted to Pixel devices was always a tenuous proposition based on Google's design choices. If Pixels remain supported whilst adding Motorola, that's only a good thing.
I'd think they just can't sell the phones preloaded with graphene in regions where these laws exist.
I don't believe GrapheneOS intends to discontinue Pixel support, as long as Google allows it.