I was at a work-related conference not long ago. One of the main speakers - yes, a main speaker - was a man who was profoundly deaf. He had a senior management job in the public sector. He had an interpreter with him (actually, he had 2) all day, both to relay his words to the audience because his own speech was very difficult to understand, and to sign to him what the other speakers were saying, and questions from the audience.
We all had to accommodate this, by speaking clearly for the signer and to allow what lip reading the man could do, and to follow what he said via his interpreter.
We all had to work a tiny bit harder to do this but I am sure no one resented this, because we thought it is important to be inclusive at work, and to think of wider issues - in this case, the fairness of ensuring this man's choice to communicate how he wanted to. He could have written the whole thing out and got us to read it off a screen or a handout, or given the talk to someone else to read out. But he wanted to stand in front of his audience and speak off the cuff as well as from notes.
I don't think expressing/bf is the same as a disability, but I do think it is a choice that should be supported by the place of work, as a gesture to their community of colleagues and indeed in this case, as a way of making the world a bit better, and bit more inclusive of working mothers and babies.