Not sure whether Vivoactive 4 supports climbing directly. If you do no find it in the list of activities when trying to add a new activity profile, then it is not supported. Either use a Connect IQ app from the CIQ app store, or record the activity as something else (for example hiking), and then, after saving the activity, edit it and change the type to Climbing in Garmin Connect.
hello,
actually i just find an app call " Boulder / climbing wall" it seem interesting.
It would be compatible with my vivoactive 4s, but i can't download it.
Each time i try to download, after a short time he ask me to download again, and i don't know why.