The 955 got Jump Rope activity added the last update 18.22.
The 945 LTE should get it and other 18.22 the next update. LTE delays updates.
If your want to earn the Badges right now I pasted an except from a blog below. The activity will not have any of the jumping stats so you cannot earn the 15,000 badge.
I'm waiting ... although I think about a 965 ... hoping a new 965 Pro or 975 come out.
If you don't have jump rope as an activity on your watch then just log it as cardio and after save and sync edit the activity to then change it to jump rope in Garmin Connect. The activity type is found in the Gym & Fitness Equipment section.
If you add a Jump Rope activity there is a field for the Reps in the overview but it isn't possible to edit that field and add your rep count.
The [Jump Rope App] from Connect IQ is currently not any better than logging it as Cardio and changing the type afterwards
955 Change Log for 18.22:
Automatically detects a transition to the next sport in a multisport activity such as a triathlon.
Adds Lap Undo.
Adds the Sleep Coach glance.
Runners can access a world wide database of tracks.
