The network permission dialog box is not displayed

My iPhone 6s (iOS 15.0) is the national version of Chinese Mainland, without a sim card I have connected the WiFi of intelligent hardware, which is not connected to the Internet When downloading the app for the first time, the network permission pop-up cannot appear I have tried all the methods that can be found online, including simulating triggering network requests and making socket connections with devices What's even more outrageous is that there is no access option for network requests in the app settings Of course, I know that permission can be triggered when I connect to the Internet, but my usage scenario is not like that I am very grateful for any suggestions.