As far as I can see Favorites can only be stored once you are at a “favorite” location.
Suggestion: Make it possible to seach a location, and then store it in Favorites. This enables you to create a Favorites list from home. .... tomtom has such a facility.
30 days ago
When you have a route open, click on the waypoint that you wish to become a favorite and then click the 3 dots ... more options tag, there you see the option to add as favorite. Your favorites will then be in the column on the left.