I haven't installed iTunes, so I don't know for certain if it is available, but I seem to recall installing Bonjour that way. Running a command like winget search itunes, you will almost certainly find the best and most current version of the application you are looking for. However, the most important part I didn't mention is that it is also one of the best ways to find and install an application to begin with.

Going back to winget, you can use it to update any application it is tracking, including win32 apps which were installed from a download. If it is a win32 executable, you can follow the shortcut to find the source file in Program Files, and then you can look at the certificate to see that it is signed by Apple.

With either bit of information you can then verify that it is a legitimate version. Similarly, you can open up the store and check your library, which will show you that application. Running winget from a command line or PowerShell, it will show an inventory of the apps which are updatable and with those installed from the Microsoft Store, it will also show you the Product ID. You can use the built in Windows Package tool winget to do some checking.

Download itunes without microsoft store