For iPhone users who use Face ID, it could cache the result, and send it to sites (signed by a per-device certificate, issued by Apple's CA) in the background, so that most users wouldn't even know this law existed.
If Apple can perform a digital attestation of a derived attribute, e.g. "older than 18", rather that disclosing name, DoB, address to the visited website, it would likely be well received.
But at that point, we're a hair's breadth away from state-corporate fusion.
I don’t know about websites, but one of Apple’s examples is almost exactly that – “older than 21” – for purchasing alcohol (in the US, yes, yes) without giving over all of the rest of the information on your ID.
Lidar is only on the iPhone Pro rear cameras.
clutches mmWave-less FaceID-less LIDAR-less iPhone SE3
If a state or other entity passes an internet bill I think is unconstitutional or otherwise infringes upon my rights as both a web user and web developer, I'm simply going to ignore the "law" and continue on, business as usual. Sue me. The curtain is falling. I can't be assed to care. California is beyond arrogant if they think they can pull this off.
Before I get roasted, GDPR is mostly a good thing, even if its implementation has made browsing the internet worse and more annoying, at least I have legal avenues for deleting my data that didn't exist before. But this is case by case. Supporting GDPR doesn't mean I should support SESTA and ilk.