I wonder why Apple allows this. Do the carriers really have more leverage than Apple here?
So Apple has made it very easy for a network admin to disable private relay. All an admin needs to do is blocking name lookups for relay.Apple.com*
*I don’t recall the actual DN used, it’s in Apple’s docs if you are curious.
a) disable this feature (that they likely don't fully understand) or
b) change their cellular service provider
they're going to choose the former even though migrating your phone number is pretty damn easy nowadays.