As noted on the comparison page for Apple Watch - Series 6, the U1 chip (Ultra Wideband) is a feature of the Apple Watch - Series 6. The WWDC 2020 session, Meet Nearby Interaction, does imply that this functionality exists on devices with a U1 chip, though the NearbyInteraction framework appears unavailable in watchOS.
Can anyone confirm whether NearbyInteraction is available for watchOS?
Can anyone confirm whether NearbyInteraction is available for watchOS?