The biometric location is just another name for the Camera Input setting that Roblox uses to animate player's avatars based on their facial structure and other such things. As Roblox describes ...

Head over to Roblox, sign in, and open the Settings using the ... Under ‘Microphone and Camera Input,’ select the little slider to the right of ‘Use microphone to chat with voice.’ ...

Before finding out how to call people on Roblox using Roblox Connect ... make sure you select the option to “enable your camera and microphone”. Article continues below 3.