I had a Pixel 3XL before that had this for years. I only had Android 12 on that device for a couple of days before my 6 Pro arrived, so not sure if it is the new device that doesn’t have this or if it is another function they took away from us in 12.
I have noticed that the tone I used to hear when disconnecting a call is missing from my 6 Pro. I can’t see an option to turn it on in the phone app or sounds menu. I find it very useful to know the call is disconnected before I say something I don’t want heard.