According to this blog post, Garmin Coach is released: https://www.garmin.com/en-US/blog/fitness/garmin-coach/
The Garmin Coach widget that appeared in a previous beta is no longer on the watch, presumably we can expect a new release or beta soon. It is a nice feature, but I am little underwhelmed to see that there is only a 5k option. Hopefully they'll add more plans.