We are with Telstra. Works fine at home on our wireless network. Its only when relying on 4G.

Hi. We are having a similar problem. iPhone 11 iOS 17.14.1. I have had to turn the VPN off as apps such as Flight Radar 24; app store and maps will not work. I have plenty of data on my 4G account and a good signal. Strangely MetroView works Ok but that is probably just dependent on the GPS and does not try and load external data. This is a recent problem, and also affects an iPhone 8 on ios 16.7.7.

Frank