@super-jet-100
This works for the android app;

Create your route then click 'end measurement'
At the top of the screen select your means of transport, 'boat' or 'car/hike' etc
A summary will then pop up so you can tweak transport settings at the bottom of the screen, along with a list of the waypoint coordinates on the route. Scroll to the last item in the menu and click 'Save to favourites'
To reload the save click on your profile button and then 'favourites'.
Scroll down to see your saved routes at the bottom.