Will FaceTime reveal my caller ID on an incoming call? Obviously if I initiate a FaceTime call then the recipient will see the caller ID that I've selected in my FaceTime settings.

However, if someone calls me at one of my alternative addresses, is my chosen caller ID revealed to them in any way? Or will they still only know about the address/number they used?
For all the experience I have, calling my family in multiple IDs, the person only knows the ID that they already have, and FaceTime has no options to automatically reveal the other IDs that person uses.

I wanted to enable some automatic thing like this for myself, because I have 4 different cell numbers and 3 e-mails with FaceTime.
Still have not found how to do it.

So for you, the answer is "no, they still only know about the ID they used".