Missing Speaker Icon on Mac Safari

AI Overview

To identify which Safari tab is making the random beeping sound, look for the speaker icon on the tab bar. If a tab is playing audio, it will have a speaker icon next to its title. You can click the speaker icon to mute the tab directly or use the "Mute All Tabs" option in the context menu of the speaker icon in the address bar. 

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I can't find such speaker icon. What gives?