This is a sample web part developed using React Framework to gather events from the underlying group calendar of a Team site. This sample also demonstrates the utilization of web parts as Teams tabs and Personal tab and offering a visualization context to change behaviors based on the platform used (Getting the proper information from the team vs. SharePoint site, understanding the context of the theme on Teams, etc.).
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-calendar