This web part demonstrates how to use PnPJS with SharePoint Framework and how to query Microsoft Graph with PnPJS. It requests a list of Azure AD groups at your tenant and shows them using Office UI Fabric React list.
Open this sample in the gallery (popup panel): Open in gallery
Source: https://github.com/pnp/sp-dev-fx-webparts/tree/main/samples/react-graph-pnpjs