The Power Automate Approvals web part is a SharePoint Framework (SPFx) solution that demonstrates how to consume the Microsoft Graph Approvals API (beta) using the native MSGraphClientV3 HTTP client. It renders a full approvals dashboard - approvals waiting on you, requests you’ve raised, and their history - with a per-item detail panel showing an activity timeline built from approver responses and reassignment history.
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Source: https://github.com/pnp/sp-dev-fx-webparts/tree/main/samples/react-powerautomate-approvals