The method of configuring the bridge mode on the home router is similar. In the WAN setting, change the connection type to 'bridged', select your new Wi-Fi, and enter the account and password, then submit.
However, most Internet access devices provided by ISPs do not have complete built-in routing functions and do not support wireless bridging. I am not sure whether HG630a supports this function.
I suggest you go to the consumer website to find more professional answers:
http://consumer.huawei.com/en/ You can also send emails to mobile@mail01.huawei.com or dial the hotline number (
https://consumer.huawei.com/en/support/hotline/)to obtain technical support.