My Apple Watch Ultra 2 is not tracking Sleep or Respiratory info

Hey clever iOS folks.

I switched to an Ultra2 in July (from what I think was a Watch 7 but not entirely sure how old it was).

With my prev Apple Watch I would simply stick it in sleep mode via the actions menu (same menu with the torch, flight mode, battery level etc on it)

since getting the Ultra2 I’ve never found a way to enable that (what seemed at the time very simple) option.

so my Ultra2 isn’t tracking sleep as a result.

has that option been removed on later watches os?

and now it can’t be done?

I have Track Sleep with Apple

Watch toggled On in the Watch app in my iPhone.

it’s such a shame as I have years of sleep data until the day I got this new watch.

second thing - and I’m wondering if it’s related. The same day, ie when I got the new watch, respiratory data hasn’t been recorded since either. Again I have breathing rate data for a looooong time, but none since I swapped watches.

respiratory is ON on the Watch privacy settings.

yet I’m still seeing resting heart rate being tracked for example.

I can’t get my head round this at all. It seemed really simple with the older watch.

the core of all of this seems to be that there isn’t a menu button to tell the watch you’re in Sleep mode (as far as I can tell).

I have noticed there’s a Sleep App in the watch but it’s not relevant as far as I can see as it would require me to set a sleep ‘schedule’ every single day, which would never be accurate anyway as I don’t know when I’m going to sleep until

I go to bed, so looking for the button that tells it ‘I’m going to bed, and until I switch the mode back off again then I’m in sleep’

(I’ve tried using sleep mode on the phone but that doesn’t do anything - and nor should it - the phone is elsewhere in the house so it’s not going to track anything)

[Re-Titled by Moderator]