Physio True Up for Body Battery?

So I've always wanted to be able to wear a Fenix during the day, but just my little vivosmart at night... or maybe sometimes I want to wear a different watch... but with my Fenix 5X that only seems to work with steps since it doesn't do Body Battery, etc. 

Since the 6 series DOES do Body Battery, stress, etc., would True Up combine all those metrics now?