Sorry for the simple question, after creating a powerapp is it possible to use it as a fully functional comercial solution? That is post it in some Microsoft App store, Azure or something else to be used by external clients? Or is it comercial but to be used under our 365 universe?
Yes, it is possible to package a Power App for distribution. The issue is access to the data source behind the app and the licensing that is required. User's of a Power App will need to be licensed and there is no provision for creating an app that includes licensing. So its possible, but not really feasible.