If it helps, I know some folks are using onWidgetFormatEvents with the “ical”/“onICAL” options in order to add various custom fields to the end of the event description (for example, a custom CTA link). I could imagine something similar being done to append
The online variables are currently sent through ICAL as X-LIVEWHALE-ONLINE-URL X-LIVEWHALE-ONLINE-BUTTON-LABEL X-LIVEWHALE-ONLINE-INSTRUCTIONS
In case you wanted to grab any of those with a module and pop them onto the end of the Description.