Open the tab (the headset icon) while in the lobby or match.
The most common cause is the setting simply being disabled or restricted to your immediate squad. Fix Warzone 2.0 Proximity Voice Chat Not Working
Even with the right settings, you must be actively connected to the game's audio channel. Open the tab (the headset icon) while in the lobby or match
If settings appear correct but still won't work, a bugged session often needs a manual refresh. Fix Warzone 2.0 Proximity Voice Chat Not Working
Go to Settings > Audio > Voice Chat and ensure "Proximity Chat" is toggled On .
Locate the Game Voice Channel setting. If it is set to "Party Only" or "Friends Only," proximity chat will not function. Change this to "All Lobby" to communicate with everyone in range.