Question about Garmin Edge Explore 2

I think that the GARMIN Connect app is also available for iPhone. This app is used to manage the Garmin Edge Explore 2.
I was able to import my routes, which were stored as ".gpx" files on the smartphone, into the app without any problems
and transfer them to the Edge Explore 2. GREET YOU!

I don't have an iPhone, but the GARMIN Connect app is certainly also available here. You can use this app to manage the Edge Explore 2 and also transfer routes (Bluetooth), and I was able to load my *.gpx files (recorded routes) without any problems.

Yes with BT

yes, you can, e.g. via Komood but also open GPX file with Garmin.