To access your SharePoint, you can use the SharePoint Connector, which is available on our Marketplace. In general, you can access SharePoint via REST API, which is described in this documentation by Microsoft.
Access to SharePoint requires authentication with OAuth. You need to set up OAuth as authentication mechanism on your Simplifier instance (here is the documentation) and also, OAuth needs to be configured on your Azure instance (here is the documentation from Microsoft).
In Simplifier, we do not have a built-in feature to display PPT files. You could convert your PPT files to PDFs or images and then show them in a sap.m.Carousel widget.
Or make them available for download, if that’s an option in your use case.