can't activate automatic subtitles

I will have participants with hearing challenges in my next training sessions. I have been asked to provide automatic subtitles. I read all the information I found in English as well as German, but I can't find the mentioned CC button anywhere. I have the latest Zoom version 5.16.10 and i work on my MacBook air with version Sonoma 14.1.2. Where can I activate the function to turn on/off the automatic subtitles?