I have shared a PowerApp with my organization for the intention of being used on the desktop.
However, many users have try to open the link from Outlook Mobile and the app opens in their phone. The issue is that when that happens, it seems the app will open on the phone but then get into an authentication error and then a wrong URL message.
Ideally, it will try to open the app using the install PowerApp mobile app on the phone (this is my case as I have the app, yet failed to open it there), or if the user doesn't have it, prompt that user to download the mobile app.
Worth noting my data sources for the app are SharePoint Lists and Office 365 Users.