Connect+ won't let me choose Galloway for half marathon

Just signed up for Connect+ with a 10K coming up in November at half marathon in February. I wanted to use Galloway for half marathon training, but Connect+ only offers me a running plan rather than run/walk.  No problem choosing Galloway for a 10K, but does Garmin Connect offer Galloway for half marathon at all? If so, how do I get there?