I have a scheduled training plan and it does not end up on the device using the Android connect app. Individually created workouts do sync, but the calendar just says it will go across at next sync but the watch only states to Download your calendar from Garmin Connect.
I just discovered that the calendar is syncing - sort of: Strength sessions are synced, but they will end up in the training calendar in the Run app. They are not visible in the training calendar widget, and they are not visible in the Strength app.