How to do background sync on ios on PWA?

Question

iOS

To avoid misunderstandings, synchronization allows us to track the presence of the network, and if something was sent in the absence of the Internet, then it is cached or sent to IndexedDB, and when the Internet appears, then without user intervention, a new attempt is made to send to the server. Still the same?)
1) Yes, background sync is not available on ios. But perhaps there are workarounds? Maybe some wrappers in the form of Cordova or Capacitor allow you to do this?
2) Does working in the background imply a minimized application, or can it not be launched at all, as if I had just rebooted the phone?