How to sync data between app in browser and added to desktop on iOS?

Question

iOS

Good evening.
Please tell me where to dig, what to read on this topic, or maybe there is some kind of guide, to be honest I don’t even know how to google it.
In general, the problem is that if I add an iOS application to the desktop via "Add to home screen", then what is in the browser and what opens through the icon becomes completely independent, they become different indexedDb, etc. . And at the same time, if I update the code on the server, then it will be updated in the browser, but there is no icon in the application.
There is no such problem on android, they have indexedDb synchronized, and everything that I update in the code is updated both there and there.

Answer 1

there is an answer here:
https://stackoverflow.com/a/23420996/1009546
i.e. it is possible to bypass hard caching by setting cache.manifest
about IndexedDB there is a question here
https://stackoverflow.com/questions/50161805/share...
and judging by the comments, it is likely that such local data sharing is not supported