@MoTaar, Thanks for posting in Q&A. To deploy Microsoft Store apps via PowerShell, you can use the Add-AppxPackage cmdlet. However, prior to sideloading the .appx files, you need to obtain the Microsoft Store .appx files that you'll use to deploy (sideload) the apps in your provisioning package. For apps in Microsoft Store, you'll need to obtain the .appx files from the app software vendor directly. If you're unable to obtain the .appx files from the app software vendor, then you will need to install the apps on the devices directly from Microsoft Store.
If you are using intone, you can deploy the app via Intune
https://learn.microsoft.com/en-us/mem/intune/apps/store-apps-microsoft
Hope the above information can help.
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