I wonder if it was this article, or something similar?I didn't save it because I didn't quite buy what they were saying--figured it was written buy an academic who never kept chickens or consulted with folks who have this experience.
https://vcahospitals.com/know-your-pet/hand-feeding-baby-birds
This one is talking about feeding baby birds that are NOT chickens, but they keep calling them "chicks."
It does say "Chicks less than one week old should be fed 6–10 times per day (every 2-3 hours)."
But those are the kinds of birds where the babies are helpless, and the parent bird does bring food and put it into the beak.
For that kind of "chick," it would be appropriate to feed on a schedule like that.
But the "chicks" in the article I found, are not chickens at all. They are a very different kind of bird, that cannot walk around or eat from a food dish.
So I wonder if the article you found was something similar to that?
https://vcahospitals.com/know-your-pet/chickens-diets-for-all-life-stages
This is an article about feeding chickens, and it does say to keep food available at all times.
(I have no idea how many other articles they have, or how accurate any others may be.)