Show page at a different route than its original route

#SvelteKit show route 'a' at route 'b'

How to show a route 'a' at route 'b' even with running the module script.

a.svelte

<!-- src/routes/a.svelte -->
<script context="module">
  export async function load({page}) {
    return {
      props: {
        path: page.path
      }
    }
  }
</script>

<script>
  export let path;
</script>

<h1>Hello from page A, currently at path: {path}</h1>

b.svelte

<!-- src/routes/b.svelte -->
<script context="module">
  import A, { load } from "./a.svelte";
  export { load }
</script>

<A ...{$$props} />