When importing gpx from 3rd parties and converting to a course, they have only two course points, the starting point and the end point. When editing it, by adding a point, the endpoint disappears.
Importing from Strava is a little better. With a linked account to Connect, the courses appear in Explore. The Strava course points are imported and appear on the watch. However, when editing the course in Explore, the Strava course points disappear and only the explore course point remains.
Does someone knows a good solution how to import editable courses to Garmin Explore?