My watch vibrates and rings for every Whatsapp, that I receive. I have checked within my Connect App (iPhone) under more-settings- and then all previous advice tells you to go on bluethooth and smart settings, but in MY app, there is no such thing. You can, within settings, click on notifications, tho. If i do, it shows, that push notifications are switched off. Also, when i check under settings in my iPhone, it shows, that garmin connect notificiations are switched off.
Now I don't know where to switch anything more off....since it appears, that all IS already switched off, while my watch vibrates with every Whatsapp message that i get. Drives me crazy!