This sample shows how to use SPFx to consume data from the Project Online REST API using a custom module for PnPjs. The web part is currently logging the data returned from the API to the browser console as a simple proof of concept.
Open this sample in the gallery (popup panel): Open in gallery
Source: https://github.com/pnp/sp-dev-fx-webparts/tree/main/samples/react-pnpjs-project-online