create-better-t-stack/apps/cli/template/base/packages/client/src/routes/about.tsx

import { createFileRoute } from "@tanstack/react-router";

export const Route = createFileRoute("/about")({
  component: AboutComponent,
});

function AboutComponent() {
  return (
    <div className="p-2">
      <h3>About</h3>
    </div>
  );
}