Absolutely. By summers end I’ll be north of 80 chickens myself and likely will have outgrown the distinction. But MOST on a site called backyard chickens will be smaller scale than “grandma’s farm”.
Some people have good success with grazing chickens behind cows or sheep. The chickens dig through and spread the mammal manure, eating undigested grains and fly larvae, and spreading it out to speed decomposition/fertilization. The chickens also get shorter grass to eat, since it’s been trimmed by the larger animals.
Most of the places I’m aware of doing that are in the south, as northern winters would obviously not accommodate the growing of pasture year round.
The most well known example is Joel Salatin, but I’m sure others do the same.