Why didn't Apple 13 upgrade to 16.2, and the epidemic prevention health code was not displayed on the WeChat page?

Network signal difference. Without network data connection, the epidemic prevention health code cannot be displayed normally. After Apple 13 upgrade 16.2, the reason why the WeChat page does not display the epidemic prevention health code is that the network signal is not good. IPhone 13 was released in ApplePark on September 202 1, Beijing time/early morning of kloc-0/5/.