This is a sample MS Graph web part that connects to Microsoft Graph and pulls SharePoint information from your tenant. It will first pull the root site collection (currently a limitation by Microsoft Graph), then it will display all the lists associated with the site followed by all the items inside the list.
Open this sample in the gallery (popup panel): Open in gallery
Source: https://github.com/pnp/sp-dev-fx-webparts/tree/main/samples/angular-msgraph