Same issue here on MacOS Tahoe. This issue makes the official Apple guide from https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/UnderstandingandPreparingfortheIPv6Transition/UnderstandingandPreparingfortheIPv6Transition.html#//apple_ref/doc/uid/TP40010220-CH213-SW16 outdated.

Woah, you just have to hold down the options key...See https://developer.apple.com/forums/thread/793878