Hello,
I can't see sleep score (only body battery, movement...) although it is mentioned in the manual. How can I see or add this feature in sleep statistics ?
Thanks
In the Garmin Connect app You can add "Sleep Score" as one of the cards on your "My Day" screen.
From the My Day screen scroll down to the bottom and select "Edit My Day."
Add Sleep Score

More here
I have an iPhone
Moved thread to Garmin Connect Mobile iOS forum.
The Lily watches do not have sleep score and insights.

Go to What is the Sleep Score and Insights Feature on My Garmin Watch?
Expand "Compatible Watches."