how to open a APPX file code example
Example 1: appx file opener
Add-AppxPackage -Path "C:\Path\to\File.Appx"
Example 2: install appx
Add-AppxPackage -Path C:\Path\to\AppxManifest.xml -Register
Add-AppxPackage -Path "C:\Path\to\File.Appx"
Add-AppxPackage -Path C:\Path\to\AppxManifest.xml -Register