A trans parent would likely still want to be called “Mom” or “Dad”, I assume. At least that’s the case with the few trans parents I know.
Parents don’t usually use “daughter” or “son” as pronouns, so I don’t think it would come up with non-binary children.
Do children of non-binary parents call their parents by their first name? It seems unlikely that they say “Parent, may I please have more screen time?”.
Yeah. I had to carefully word my dad’s obituary to not gender me–I wasn’t out yet, but it would have added more pain to the event if I’d been misgendered in it. Luckily, I have a sibling, so I able to rework the first draft from “survived by his son ___ and daughter ___” to be “survived by his children __ and __”.
Anyways, if I had a kid I think I’d just go by my name, or any nickname they came up with. I called my binary parents by their names so it doesn’t feel weird to me.