Hi friend.
Please refer to the following three methods:
Method 1: Log in to the web-based management page and choose Advanced > Wi-Fi > Wi-Fi Security Settings > Options. Then check and change the Wi-Fi password in Wi-Fi password.


Method 2: Log in to the web-based management page and choose Wi-Fi Settings > Wi-Fi Basic Settings. Then check and change the Wi-Fi password in Wi-Fi password.

Method 3: Log in to the HUAWEI SmartHome app and choose Tools > Advanced settings > Wi-Fi settings > My Wi-Fi. Then, check and change the Wi-Fi password under Password.

Thanks.