I have no idea where you are, what your weather is like, or what your set-up is like. (South of the equator, it is wintertime). Were they raised with the flock or in a separate enclosure? It's hard to talk about your specific situation without knowing some of the details, so I'll talk about mine in general.
I have a lot of room in my coop and run, and I usually let them free range anyway. Broody hens may wean their chicks at 4 weeks or they may wait a month or more longer. I don't know how they decide when to wean them. Most breeds are fully feathered out at 4 to 5 weeks, so they really don't need supplemental heat, especially when it is in the 90's during the day and in the 70's at night.
When my broody hens wean their chicks, I leave them alone. Mama has already taken care of integration issues and taught them how to find food and water. They should know where to go to at night. They are usually capable of taking care of themselves. At least mine always have been. I do think the amount of room they have plays into it a lot.
They may be fully integrated into the flock, which means the other chickens see them as flock members and will not treat them as outsiders and a threat to the flock, but they are definitely lowest in the pecking order. The older chickens will enforce their pecking order rights if the young ones invade their personal space. But if the young ones run away when first pecked, life is good and happy in the flock once again. This is where the extra room comes in handy. They have to have enough room to run away. It also helps for them to have enough room to stay out of the way of the older chickens. I strongly believe the amount of room is very important.
Mama has already taken care of integration issues, at least with mine since they were raised with the flock. To me, that is a big reason to let her raise them with the flock. If I were to separate them, they would have to go through another integration later. Again, I don't know what your specific situation is.
The only special feeding issue I do is that I provide food and water at separate locations. That way, the young ones can get to the feed and water more easily without having to get close to the older birds higher in the pecking order.
If they are used to sleeping in a place other than the main coop, I'd let them continue to do that. I find the biggest aggression due to pecking order issues occur on the roosts at bedtime. You might have a different situation. Each flock has its own flock dynamics. If they are sleeping in the main coop, they may sleep in the floor to stay away from the bigger chickens or they may be able to roost with the older chickens without a problem. I've had both happen.
I don't know if you will get anything beneficial out of this or not. Each flock has its own dynamics and each of us have different set-ups and circumstances. Good luck however you go.