As Shane Young just reported, there is a nice new integration of Power Automate (Flow) in PowerApps. Otherwise you always have to deal with many windows. Thanks for the tip. Great pleasure.
Shane Young PowerApps MVP: "I can't believe the Power Apps and Power Automate teams finally added a way to manage your flows into Studio. Hooray! As a guy with over 100 flows search is life changing. 😍 This is in production, not preview! 😍"