Triathlon Garmin Coach Plan Not Appearing on Forerunner 965

I’m trying to start a triathlon training plan with my Garmin Forerunner 965.

In Garmin Connect I added a triathlon event. In the Garmin Coach section it says under “Which events can I train for?” that triathlon, including half distance, is supported. However, when I try to set up the plan, only running or cycling options appear. A triathlon plan does not show, neither in the mobile app nor in the desktop web version.

My watch, the Garmin Connect app, and my iPhone iOS are fully up to date. The software version on my watch is 27.09.