#1 Use (phone) OsmAnd app are easy to build a route.gpx file,
show my video: https://youtu.be/H74MWYVkjIw?si=IeMdaB51GXWdKSni
where to download OsmAnd app : https://osmand.net/
#2 upload a route.gpx file to mappily routes by phone web browser app
#3 use (watch) mappily app for navigation
In step #2 ,no share by Cx file explore app.
Could a route.gpx file be direct to mappily routes ?