It seems to me it is a long time feature request. I saw on internet there are some who also wrote an open letter to implement such a feature. I reported this many times through the Garmin form but with no success. Any suggestion on how to be heard? On-line petition?
I just started an online petition since it seems that none has been done.
www.ipetitions.com/.../letter-to-garmin-extend-vibration-on-incoming