If you’re a mammal, and you’re feeding your baby with milk produced by your own body, it’s breastfeeding.
That’s just simple scientific fact (admittedly, we all know how gender ideologues feel about scientific fact).
Chests don’t produce milk. Breasts do.
Breastfeeding is a one word description which has served humanity just fine for all of our existence.
It doesn’t need to be changed - and it certainly doesn’t need to be changed to word that doesn’t even make sense.
There is nothing ‘exclusive’ about breastfeeding.
All transmen and non-binary women feeding their babies with milk produced by their own bodies are breastfeeding, like it or not.
It is beyond next-level precious to have an issue with the word, when you’re big, fat sitting there, feeding your baby with milk you’re literally lactating from your human breasts.