@Steven-Peyton I do it as follows.
Android!
Open the route on your smartphone, generate GPX 1.1, then open it with the Connected app.
The Connected app offers three options:
Track, bases, waypoints.
Then just sync it with your motorcycle.
iOS ...
Here you should not use GPX 1.1 but ‘HD Boom Box Route’.
Another note about the map material.
The BMW app uses Tom Tom.
You should also use Tom Tom in MRA.
One more note about iOS:
The name of the route must not contain any umlauts, such as äüö, for example.
Otherwise, problems may also arise.