Is a sound toggle button relevant today?

I'm building a game which will be playable on desktop browsers and mobile devices. This game will have sounds for various actions. My question is whether including a sound on/off toggle is nowadays relevant, and especially in the context of a game. Is there a possibility that this is not needed anymore because users know exactly what to do in order to adjust the volume on desktop or mobile, or even completely mute a desktop browser tab in case they need to?