Now that the kind of help I'm looking for, like turning on broadcast mode! Unfortunately no where under setting can I find Broadcast mode! I've looked everywhere trying to find something not turned on.

I did write both Garmin and Wahoo, Wahoo answered the next day, they don't feel the Vivosmart3 rebroadcasts!!! I have NOT heard back from Garmin yet in 3 days.
I don't get it WHY make it both Bluetooth and Ant+ if it's not going to rebroadcast You don't need both to talk with your own app!, is it me? Am I missing something or is that stupid ??
Not happy with Garmin and I'm going to do what I can to return the Vivosmart, don't even want to exchange for one that broadcast...I'm done.
Very happy with the Wahoo Bolt so far, guess I'll buy their arm band HR monitor.

Update: a phone call with Garmin confirms the Vivosmart3 does NOT rebroadcast! he had no answer for why Bluetooth / Ant+ if not rebroadcasting!!!
RMA issued