Pixel 3A microphone not making the "ready beep" when I tap on it

This is not a big deal but it is to me….normally when I would want to send a text message via talk feature, I would tap on the microphone, wait for the “ready” beep and then start talking. For some reason that beep has gone away. Anyone know how to get it back? If you don’t know what I mean, click on the message icon and instead of typing your message, click on the microphone and you will hear a beep. I no longer hear that beep…it disappeared about 48 hours ago. Thank you!