https://learn.microsoft.com/en-us/powershell/module/microsoft.sharepoint.powershell/import-spapppackage?view=sharepoint-ps&redirectedfrom=MSDN
Import-SPAppPackage (Microsoft.SharePoint.Powershell) | Microsoft Learn
Use the Import-SPAppPackage cmdlet to import an app package from the content database and create an app inside the site collection by using the SiteCollection...
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