Roblox voice chat on MacBook

Hi! I’m not sure if this issue is considered a problem within the game itself, or it’s just my computer but i want to see if anyone else has the same issue. For the past day I have been trying to use Roblox voice chat on my macbook air, even though i have the settings on that are required to use the voice chat, there is no microphone icon that allows me to turn it on or off. My age is verified and i have nothing restricting my microphone (at least that i know about). Is this just a game bug or something on my computer that is not allowing it

[Re-Titled by Moderator]