For planning a hike it may help to switch on the hiking popular layer and set the turn points accordingly. Now Garmin introduced this trail layers. It would be nice to plan a hike with it. However, when starting to create a course, this 'layer' disappears. It behaves like no layer but like recorded activities and imported gpx tracks. You can see them on the map, but once you start creating a course, the disappear from the map. Only saved waypoints are visible.
In fact, the new trail 'layer' is more a set of trails. I don't know if that are hiked trails by some individuals (like Komoot trails), ore if that are officicia trails. But then, why are there so few? There are many more in my area. Why Garmin does not just take the waymarked trails which are free available in OSM, and not only for hiking but for cycling and MTB?