Some sex links will go broody, but they are not usually known to go broody a lot. Most sex links never go broody.
You cannot make a hen go broody. When the hormones kick in, she will go broody. Until then, she willl not. Some people come up with ways that they say will make a hen go broody, some of them really bizarre. Some of them may help a hen that is thinking about going broody kick over the edge, but I really think the hormones have to be acting up a ittle before any of them have much chance. I don't think most of them help anyway, but we are dealing with living animals so it is hard to say anything for sure.
It is not that unusual for a hen to act a little broody but not be serious about it. I've had several hens get defensive in a nest, fluff up and walk around with a bad attitude, stay on the nest a lot, and give off a lot of signs that she is broody, but she never fully commits. If I have a hen spend two consecutive nights on the nest instead of roosting in her normal spot, I give her eggs to hatch. Until she spends those two consecutive nights, I assume she is just pretending and is not serious.