Also in Health you can see the actual data that’s been imported and when so it might give you an idea of when it stopped which may help your troubleshooting.
Yeah I did that already – Cardio Fitness stopped syncing with ‘Health’on 1 November, Cardio Recovery stopped on 28 September. Everything else is syncing across in real time. Cardio Fitness has continued to sync with the ‘Fitness’ app (Cardio Rovery doesn’t appear in the Fitness app).
Oddly, though, I tried manually adding data to both earlier today to see if it could prompt them to work again, and since then, Cardio Fitness has synced (but not Cardio Recovery). All very weird.