I keep thinking of something like “he/him, they/them-compatible” for myself, but often second-guess the phrasing of the latter.
My intention with it, and approach for myself is, roughly, I identify as male, and consider they/them to be gender-ambiguous, so I wouldn’t find being referred to as “they” to be misgendering, but rather, a refusal to acknowledge a gender, and I would like to figure out how to communicate “I am OK with not having an explicit gender attached to all of my references” in fewer words.
Perhaps this ship has already sailed, but I do find “it” as a reference to a person to be dehumanizing, and to carry more stigma than respect in a general use, default case. English disambiguate “who” and “which” (“My bicycle, which is waiting outside” vs “My friend, who is waiting outside”), so “they” seems more appropriate than “it”, to me.
That said, if someone said their preferred pronouns are it/it’s, I would do my best to comply with those wishes.
The whole “but ‘they’ is plural” argument exhausts me. Aside from the evidence that it’s been used as a singular long ago, it’s also IMO exasperatingly pedantic and usually selectively so; if someone is going to be pedantic about singular-they, then consistency suggests they also shouldn’t use most modern colloquialisms, don’t say “um” in between words while they speak, and like, don’t call a record dope or a beat sick or a rhyme tight, keep using Thou, and maybe idk also get vaccinated for bubonic plague ¯_(ツ)_/¯
(That rant isn’t directed at anyone here specifically, just like, language is malleable… being rigid about singular-they and lax about other language mishaps just feels like thinly veiled intolerance)