The WiFi icon on the iPhone not showing is the wireless network you are connected to, does not have an internet connection. This is a fairly recent change. On earlier versions of iOS this icon was always displayed and shows a user if they are using WiFi or 4G connection for internet, which is an important thing to know.

Most users will be connected to normal home or office wireless networks that have an internet connection. Only a small percentage of iPhone users will have an iAISTX or similar wireless device that does not have internet connection, so having a feature for the majority won the day.

The weak security message is also a recent change, as Apple are pushing all of their users to move to the latest and most secure WPA3 security. The reality is that WPA2 is still very secure and still used on the majority of wireless networks, so it is nothing to be worried about. Even if a hacker did manage to crack your iAISTX, all they would gain is the location of all the AIS equipped vessels around you – not any sensitive banking or personal info.