I've noticed this a lot in the last couple of years, it seems much more common in articles broadly on board with GI, pronouns, using the word Queer to describe anyone not achingly boring.
I've also noticed it coming out the mouths of my friends who are more TWAW inclined.
The word 'people' doesn't seem to have explicit links with biological realism or gender critical beliefs but it seems out of fashion in some circles.
Is this coincidence and more related to younger trendier language (!) or is it chosen for a reason?