
Explanation:
Box 1: Configure the For developers settings in the Settings app
How to allow Windows 10 to sideload apps on your computer
1. Open Settings.
2. Click on Update & security.
3. Click on For developers.
4. Under "Use developer features," select the Sideload apps option.
5. Click Yes to confirm the risks involved running an app outside the Windows Store.
6. Restart your computer if applicable to complete the task.
Box 2: Run the Add-AppxPackage cmdlet
Install the App.
From the folder with the .msix package, run the Windows PowerShell Add-AppxPackage command to install the .msix package.
Reference:
https://docs.microsoft.com/en-us/windows/application-management/sideload-apps-in-windows-10