Apparently not supported. From ST tech support:
I would like to inform you that Life360 is a groovy app that is not supported in the New SmartThings app. The devices can be seen in the app but are probably not controllable from there.
You can setup life360 integration through a classic app.
yes, we can setup life 360 app and also virtual device creator app in old smartthing app, but what about new smarthing app.
how can we add life 360 and virtual device creator app directly from new smartthing app???
old smartthing app will shutdown very soon, then what??
so how we make virtual devices and how can we use life 360 app???
So is Life360 dead to Smarthings in the new app? I use my phone as my presence sensor and when it was used with Life360, it triggered all my events almost without fault. At best without it. works 50-50.
No chance in a resurrection of life 360?