I'm actually not sure what my comeback line would be if someone were to ask me, "what my pronouns are". I'm thinking I'd either be dumbfounded and at a loss for words, or else coming back with an offensive, smartass reply.
Offer to help them find an English as a Second Language course.
Among the many problems with the idiocy of "my pronouns" is that the whole purpose of pronouns like she and him is to be generic shortcuts. By nature, they aren't particular at all, but apply to one half of humanity or the other. They aren't yours or mine.
The second half of that problem is that pronouns are a shortcut. They're convenient. Unless, of course, you have to announce "your" pronouns, or look at someone's profile or email signature to know how to talk about them.
This deconstruction of the language has more in common with the French or Bolshevik revolutions than the American. So no thank you, lefties.
This stuff can only make headway in a dumbed-down populace. Even the snarky retorts to pronoun chicanery reveal that most of us don't know what a pronoun is. I'm sure Millcreek knows that "Skippy the Wonder Dog" is not a pronoun, but most don't seem to.