I assume that you are looking for a Dashboard, view, Edit/New form that comes in PowerApps whenever you connect using SharePoint Connector.
If that is true, than you can create a PowerApp with SharePoint connector,so that you will have those screens that you are looking for. Than create another PowerApp with SQL connector and copy paste those three screens from previous app to current App and Change the connection.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…