There are exemptions to the requirement for "cookie popups" although they are rather hand-wavy:
See:
https://ico.org.uk/for-organisations/guide-to-pecr/cookies-and-similar-technologies/#exemptions (UK Information Commisioner's office)
I'd say that Apple consider the cookies they use are essential for the provision of their service and hence fall under that clause, and I'm sure they've paid some lawyers to agree with them - when it comes to enforcing data privacy, the authorities have bigger fish to fry (some of them with Apple!) than a few edge-case cookie dialogues. We're talking Apple, here, too - compulsive secret-keepers - so I doubt that they are actually gathering data to sell to third parties.
If you're not using cookies to profile users and/or sell their data to advertisers then trying to work within the "exempt" uses is a good thing rather than helping to normalise the idea that every website you visit will require you to accept T&Cs without stopping to read them. Unfortunately, too many of the sources of information out there are from people trying to sell you "compliance solutions".