They and them have been singular pronouns for centuries. It's called the singular they, and is used to refer to a person whose gender is unknown or unspecified.
"Someone is coming up the street, and they will be here in five minutes."
Perfectly normal.
But there was no gender pronoun for a specifically identified individual in that sentence, so your attempt misses the mark.
“They” can be used to refer to an individual who has already been identified as “he” or “she” or by name.. but it’s not used as the primary pronoun because it would make no sense, as it would suggest a plural value to represent an individual person.
It’s like saying “these shoe”… huh? If there’s only one shoe, the proper terminology is “this shoe”… and if you have a pair it’s “these shoes”. This isn’t done to misgender/mislabel the shoe in order to deny its Existence.. it’s functional language used to convey information more efficiently, and has nothing to do with how anyone feels.
They teach you this in elementary school, I don’t get why trans activists struggle with it so often. Language serves a functional purpose, and if someone wants to try to step in to personalize functional systems of language, and try to shame or condemn those who use it going forward.. that’s just common modern Tik/Tok leftist narcissism in expecting the world to conform to one’s irregular worldview.
Believe it or not, 99.99999% of the world has far greater and more important things to worry about than the pronoun used to describe them. Food, shelter, work, family, stress, health, safety… most people focus on these. Leftists/trans activists appear to put these issues on the back burner for everyone, and want to make society all about how they feel, while condemning anyone who doesn’t take the time to celebrate them.