It’s not iPhone memory issue if it was that then app would be cleared. It goes on standby there should be a feature run or download content in background and it could be ios limitation or app limitation
There are reasons for WiFi repeating instead of connecting to the same network. E.g if you have a device limit for the connections (e.g. on some cruise line internet plans) or the WiFi signal is too weak and you want to use your phone as range extension.
for 3 i think they mean you could be able to have your phone as a kind of wifi repeater, like you can in windows
You can just view the WiFi password in settings.
There are reasons for WiFi repeating instead of connecting to the same network. E.g if you have a device limit for the connections (e.g. on some cruise line internet plans) or the WiFi signal is too weak and you want to use your phone as range extension.