Page in parent app

Visit child app 1, here are problems
Visit child app 2, different folder structure, works fine
Visit child app 3, app router

Query from router

{
  "currentDomain": "next-rewrite-test-parent.vercel.app",
  "subpage": [
    "sitemap.xml"
  ]
}

Params from getStaticProps

{
  "params": {
    "currentDomain": "next-rewrite-test-parent.vercel.app",
    "subpage": [
      "sitemap.xml"
    ]
  }
}