Is that this browser?
I tried it on an Android 15 virtual device - here is Chrome properly working:
and Firefox:
but when I try and use the Mi Browser, if I navigate to any website it immediately crashes:
(screenshot taken immediately before crash)
It may be the Chromium rendering engine, but they’ve evidently done something to their version that makes these buttons not work. These problems are likely best reported to the respective developer via the browser’s feedback mechanism.