Huawei phones will only connect automatically when they remember the wifi password and receive a wifi signal. First of all, open the Settings page of Huawei mobile phone, which has the wifi option, click to turn on wifi.
Then select the target wifi in the automatic search wifi, connect, enter the password, and select automatic connection.
Finally, after the connection is successful, turn off the wifi, and then turn on the wifi to see if it will automatically connect. You can add a wifi name and password if you cannot search for wifi. Try moving the position when the signal is weak