Not deployed
yet
The dashboard is not a page on this site. It is served by the Adeia server itself, because it reads your actions out of a database and signs you in against GitHub — neither of which a static site can do.
That server is not hosted anywhere yet. Until it is, the dashboard runs locally and nowhere else. Clone the repository, follow the quickstart, and it is at http://localhost:3000/dashboard.
When the server is deployed this file stops being reachable: the application mounts /dashboard ahead of the static site, so the real page wins wherever there is a real page.