Enable little green camera next to comment box during Facebook live

I use an iPhone 14 to watch a Facebook Live Class. The teacher requires that we enable the camera and microphone in settings which I have succeeded in doing. The teacher also requires that a little green camera appear to the right of the comment box in order for him to choose me to answer a question. I am unable to see a little green camera next to the comment box during the Facebook Live thus he is unable to bring into the live class. I have talked to iPhone Customer Service and they have helped me enable the camera and microphone in settings numerous times. They say the problem is with the Facebook settings. Please advise!!!!!