OK .. just noticed something wierd ..
We have been experimenting with the New capability of Flows calling other Flows. To do this with the NEw MS sanctioned method it requires the use of the Solutions organizing object. The problem is that when you move flows into a Solution. The base flows disappear form the MyFlows/Team Flows organizer and therefore disappear from the Mobile App.
You can still get approval requests from Flows organized in Solutions ... but you can't edit or get run status for those flows.
Just beware for those of you organizing into Solutions.