See this blog: https://info.myrouteapp.com/blog-routes-loading-garmin-zumo-xt/
In short: gpx 1.1 is a route with shaping and via points
gpx 1.2 is a route-track with via points
In the XT2 you have to link the track to a collection
See all the options in the Explore icon on the XT2
There are indeed some issues regarding a Mac and the XT(2). See also: https://forum.myrouteapp.com/topic/1396/garmin-zumo-xt-mac?_=1722582031290
There are 2 ways to put the route in your XT(2):
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Save the route as gpx 1.1 (this will be placed in the download folder) move the gpx file using Android File Transfer to the GPX folder on the XT(2)
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Download the MRA App "My-Route-app" from the app store.
Download the Garmind Drive-App (XT) or the Garmin Tread (XT2)
Log in with your MRA account
Go to routes in the app, open the route, choose download, choose export, then choose the Garmin Drive App (XT) or Tread (XT2).
If you have connected the App to your XT with your Garmin account, the route will be transferred to the XT(2)
In both cases, restart the XT(2) and you will receive a message that there is a new route that you can import. Choose Yes.