Hi @Escapingbug this is very good question. We have no built-in way to start UWP app by its name. But there are few ways to do that.

If it's not critical to share your script for several PCs, you can run Task Manager, go to tab "Details", find your app, do right click and choose "Open file location". Path to executable file will be open in explorer.exe. Not sure this way is resistant to the app update.

Also I could find PowerShell command (checked for Skype as an example):

Get-AppxPackage -allusers *Skype* | foreach {start shell:AppsFolder\$($_.PackageFamilyName)!App}

So you have to add powershell.exe to your command in subprocess.Popen(...) call and then use Application(backend="uia").connect(path="your_app.exe") subsequently.

Hope it helps for now.

It's also possible to use new Win32 API functions controlling WindowsStore app packages inside pywinauto. But this feature request needs some time for learning and implementation. Can't promise to implement it soon. Let's keep this issue open for future contributions.