[redwoolf]

What is the salutation for they/them pronouns?

[evolve2k]

Mx

“The x is intended to stand as a wildcard character“ https://en.m.wikipedia.org/wiki/Mx_(title)

Meaning not exactly the same, but closest relevant title.

[redwoolf]

I did not know that. Thanks! But it's so rare that people even use honorifics at all these days.

[ebiester]

Mx. is the most common.