Agree with PM. It really does depend on the broody. If she is not fond of humans, you will have an uphill battle.
If your broody is on the fence, if you can corrupt her over to being a fan of humans, you can then use her to demonstrate to the chicks that lap cuddles are a desirable thing to participate in.
I had a broody raise a single chick this past summer. The egg donor of the chick has not been overly friendly so I was prepared for the offspring also to be standoffish, but I didn't reckon on the broody.
My broody has always been a lap hog. She loves to get cuddled and she does a very good imitation of giggling when she's held. She was no less eager for lap cuddles as a broody so from the time the chick was just a few days old, I cuddled the two of them together in my arms and lap. The chick enjoyed it every bit as much as her broody mama, and she never was the least bit skittish.
The "chick" is now four months old, and she is still very happy to be cuddled. I recommend including the broody each time you handle a chick providing the broody is receptive to being handled.