IOS11 App, system settings do not have wireless LAN permissions, only 4G?

after installing our app, only 4G can connect to the Internet, but not in the case of Wi-Fi . You can find our app, in the settings there is no option for wireless LAN . Normally, if you turn on the wireless LAN assistant under the cellular settings, the App starts and the network request will pop up the Wi-Fi& cell, and the Wi-Fi, does not use the network. How can I prompt or display permissions?

Ios
Mar.07,2021
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