Is it possible to create a new MTB activity profile on my edge explore 2 ? I only see 3 profiles, is this missing on this model ?
Indeed you cannot add your own profiles as @tmk2 states. The only things you can change are the name and the color of the profile. If you change the name of the OFF ROAD profile to for example MTB it will…
You can't. Explore 2 has three predefined profiles: road cycling, gravel biking and indoor training. You can rename it, but you can't change it's type. There is feature request for adding this ability…
Indeed you cannot add your own profiles as @tmk2 states. The only things you can change are the name and the color of the profile. If you change the name of the OFF ROAD profile to for example MTB it will show as MTB on the device, but when you upload your activity to Garmin Connect the activity class is registered as 'GRAVEL/UNPAVED CYCLING'. You can only change the activity type afterwards in Connect, but not on the device in the profile properties itself. That's an omission, to say it politely.
You can't. Explore 2 has three predefined profiles: road cycling, gravel biking and indoor training. You can rename it, but you can't change it's type. There is feature request for adding this ability in future firmware versions:
https://forums.garmin.com/beta-program/edge-explore-2/edge-explore-2---public-beta-bug-reports/i/edge-explore-2---10-xx-bug-reports/change-bike-type-in-activity-profile