Defining new Geofences from within a Make Scenario

I’ve set up a few geofences in the iOS Make app which are happily working - fixed places like home, work and mother-in-law’s all going fine.

Now I’m thinking I’d like to use this function to track other work that I do at weddings… is there a way to set up a geoence on the Make app other than using the app interface? Ideally I’d like to set one up from within a Scenario but I can’t find a function for that. Anyone got an idea?