did you search? https://developer.apple.com/documentation/nearbyinteraction/discovering_peers_with_multipeerconnectivity
gbdavidx
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https://developer.apple.com/documentation/nearbyinteraction/implementing_interactions_between_users_in_close_proximity
https://developer.apple.com/videos/play/wwdc2020/10668/
The Nearby Interaction framework streams distance and direction between opted-in Apple devices containing the U1 chip
Not necessarily, it says "apple devices with u1 chip", next apple watches have u1 chip