Genuine question about they/them pronouns
If a nonbinary (as an individual, not a group) uses they/them, would it correct to say They have or They has?
Streamed #DispatchGame today. Was initially supposed to be a like, 1-2 hour stream. 6 and a half hours later, I finished the entire game in one sitting. Legitimately one of the best I've played in a while.