If your hardware has this function, then you don’t need to set one up in the Control room, You’d only need this if your HW didn’t have the facility.
E.g. I have a UR28M which has 2 Phones out. The Phones 1 is hardwaired to the mix 1 bus the phones 2 out can be switched between any of the mixes - so I make my mix 1 my cue (artist) mix (I only need the 1 in my case) mix 2 is then my main, and mix 3 can be a FX or send or whatever. Phones 2 is then the obvious choice for the engoineeers phones in this case. In the Control room I don’t set up a headphone channel at all. Similarly the 2TR input can double for me as a talkback should I require it so this too is not set up in the CR. The UR28m also features mono, dimming and muting so I don’t need these in the CR either even though they are at hand.
Basically the CR offers all the facilities you might require, but you don’t have to use them if you don’t need them.