I have a problem with Progressive Web Apps. I have an app and the service worker is registered successfully. I can download the app. However, only the index.html works offline and not all other subpages. However, I have added them in the array to save. On Windows it works fine. Only on the smartphone it does not. My default browser is the Samsung browser (Samsung smartphone) What can I do? Do you have any ideas?

Here is my registration in the index.hmtl:

if ("serviceWorker" in navigator) {
     window.addEventListener('load', function() {
      navigator.serviceWorker.register( "./SW.js").then(
       function(erfolg) {
        console.log( "ServiceWorker wurde registriert.", erfolg);
       }
      ).catch(
       function(fehler) {
        console.log( "ServiceWorker wurde leider nicht registriert.", fehler);
       }
      );
     });
    }

Here is my SW.js with the events for the service worker:

const contentToCache = [
  '/index.html',
  '/Upload.html',
  '/Save.html',
  '/Routing.js',
  '/LocalStorageService.js'
];

self.addEventListener('install', (e) => {
console.log("[SERVICE WORKER] INSTALL DATA");
e.waitUntil((async () => {
  const cache = await caches.open("Baum-App");
  await cache.addAll(contentToCache);
})());
});

self.addEventListener('fetch', (e) => {
  e.respondWith((async () => {
    const r = await caches.match(e.request);
    console.log(`[Service Worker] Fetching resource: ${e.request.url}`);
    if (r) { return r; }
    const response = await fetch(e.request);
    const cache = await caches.open("Baum-App");
    console.log(`[Service Worker] Caching new resource: ${e.request.url}`);
    cache.put(e.request, response.clone());
    return response;
  })());
});

I ran the app on Windows and it works there. I have tried a lot, but unfortunately I don't know much about it yet.