Can't the WeChat notification volume of iphone be adjusted?

The volume of WeChat notification follows the volume of mobile phone. Just adjust the volume of mobile phone. Here, take the iPhone 6s mobile phone as an example, and the specific methods are as follows:

First click the "Settings" icon on the phone desktop, as shown in the figure below.

2. Then, in the drop-down menu of the phone setting interface, select the "sound" option, as shown in the figure below.

3. After entering the sound interface, slide the slider in the red box below to adjust the volume of the mobile phone, as shown in the figure.