The MagicWatch 2 supports blood oxygen saturation monitoring too; it's just that Honor left its Sp02 sensor disabled for six months
Honor has enabled blood oxygen saturation monitoring on the MagicWatch 2. Following in the footsteps of Fitbit and Huawei, Honor has enabled the Sp02 sensor in the MagicWatch 2 Announced in November 2019, the Sp02 sensor has been left idle until now.
Available via a firmware update, the sensor can provide information about how blood oxygen saturation alters during physical activity or during altitude changes. The update also brings menstrual cycle tracking to the MagicWatch 2 along with general stability improvements.
If you are awaiting the update, then it is rolling out now as version 18.104.22.168. The update is 20.30 MB and should have already reached most units.