[avarun]

Has to be a fuckup. watchOS 26 supported the Series 6 onwards. I don't think Apple has ever cut 3 generations of devices with a single yearly OS upgrade unless there's an underlying architecture reason for it before.

This might be the list for Siri AI supported watches or something.

[thewebguyd]

Seems you are correct, the beta is now showing available on my Series 9 at least.