When I open up Garmin Trails in the Connect app (More->Training & Planning->Garmin Trails), it just has a black screen, with a bottom bar that says "No Nearby Trails" and a text box that says "Garmin Connect won't run without Google Play services, which are not supported by your device."
I intentionally do not have play services installed, I try to be de-googled as much as possible. Can the app use OpenStreetMaps for the mapping backend instead of google?