I googled it and discovered...I'm not alone ! I recently switched to this sportwatch from a smartwatch (Galaxy Watch 3).
The one thing I miss is feeling the vibration and tones !
Even seated and in a super silent environment...I can't hear and feel it ! Let's imagine during hard sport activity and running...zero !!
So I have to rely on my smartwatch (that I have to bring with me at this point) and when running on my headset - that I wish I could avoid especially when running in the city center :-)
It's 2 weeks old and I could return it but I think it's not mine rather ..the model itself.
I hope this can be fixed via software update and not an hardware limitation.
Thanks to Garmin if can fix it.
Gianni