You make a valid point with the Apple Watch SE1! I personally don't have an Apple Watch so didn't spot this, but it looks like Apple stopped with pushing update

You make a valid point with the Apple Watch SE1! I personally don't have an Apple Watch so didn't spot this, but it looks like Apple stopped with pushing updates this way for the Apple watch from the Series 6 and SE1 :( In a similar way the 2017 MacBook updates are not present via the checks I run :( Good chance Apple has either given up hosting with it now being EOL or are running on some separate infrastructure. Sorry I couldn't be any use to you!