notFoundComponent doesn’t appear on live docs pages for invalid routes

Which project does this relate to?

Router

Describe the bug

When visiting a non-existent page on the TanStack Router/Start documentation website (e.g., https://tanstack.com/router/abc), the page does not display a proper "Page Not Found" UI.

Your Example Website or App

https://tanstack.com/router/abc

Steps to Reproduce the Bug or Issue

1. Go to https://tanstack.com/router/abc (or any invalid route on the docs site)
2. Observe that the page does not show a "not found" message or component.

Expected behavior

A clear "Page not found" UI should be displayed ideally using the notFoundComponent defined in the docs.

Screenshots or Videos

No response

Platform

• Router / Start Version: [e.g. 1.121.0]
• OS: [e.g. macOS, Windows, Linux]
• Browser: [e.g. Chrome, Safari, Firefox]
• Browser Version: [e.g. 91.1]
• Bundler: [e.g. vite]
• Bundler Version: [e.g. 7.0.0]

Additional context

No response

Reproduce the invalid-route behavior at https://tanstack.com/router/abc and inspect the documentation site's route configuration, focusing on where the documented notFoundComponent is defined and applied. Confirm the expected Page Not Found UI and identify the relevant route entry or test before making a change; done means invalid live documentation URLs display that UI.