Are u setting a default layout in app.js|ts ?

If so try setting the resolver like this

resolve: (name) => {
    const page = resolvePageComponent(
      `./Pages/${name}.vue`,
      import.meta.glob<DefineComponent>('./Pages/**/*.vue'),
    );
    page.then((p) => {
      p.default.layout = p.default?.layout || MainLayout;
    });
    return page;
  },