How do I change my avatar on mobile phone?

I looked how to change my avatar, but it was for computers. I am using the browser on an apple phone. I followed the instructions anyways, clicking on the avatar when I was on my profile on Dashboard. Nothing happened. Can somebody please help? I’m new.

Edit: I saw that you’re supposed to list your platform and browser. Just to be clear…I am using an IOS phone, and the browser that I’m using is called Qwant (since the browser that I normally use, Yandex won’t work because it’s Russian)