I know not a lot of people use Health to track so Garmin tends to ignore it. All it needs is a couple of simple changes to make it usable. PLEASE Garmin add the following to Health as a bare minimum.
1. Allow you to select past data points and see data (this was enabled for a few days and removed for some (obtuse to me ) reason).
2. Allow edit/delete/manual entry of all data ponts.