I have an Edge 530 (and a Forerunner 745) and I keep track of my Cycling Functional Threshold Power (FTP) in Garmin Connect. When I go to my Index S2 (fw 2.08) widget screen in Garmin Connect there is an option to enable "Power-to-Weight Ratio" Widget available (in between "Weight Trend" and "Weather" in my screenshot).
I have tried toggling it on and off and letting the scale sync a couple of times but the widget never appears on the scale.
Is this a real working widget and has anyone made it work on their scale?