“Fundamentally though, it’s exactly the same concept: a way that web servers can demand your device prove it is a sufficiently ’legitimate’ device before browsing the web.”
Everyone is yelling at Google over Web Environment Integrity. Apple already shipped the same idea as Private Access Tokens in macOS 13, iOS 16 and Safari, and Cloudflare and Fastly use it today. Apple decides what counts as a legitimate device, browser and OS. It only escaped the backlash because Safari has 20% of the market and nobody can afford to block the other 80%.