That's not true. The browser's push service wakes the service worker on delivery, even if the PWA is fully closed. That's the entire point of Push API vs polling.
And the OS will never background the browser for battery optimization reasons? Genuine question, I'm not an expert on mobile OSs (as you already guessed).
That's not true. The browser's push service wakes the service worker on delivery, even if the PWA is fully closed. That's the entire point of Push API vs polling.