It's really a crap shoot. I have a few hens that go broody, set half way through, then quit. Others set until hatch. Not all of them will each season, and not all hens will go broody, period.
Given the proper habitat, helps. Planted enclosures and not a lot of disturbances increase the chances.
Had one hen last season set on 2 clutches and hatched both...another set, hatched then walked away from her chicks.
So you can see it's not a for sure thing...the hen that walked away was F1 generation from wild stock.
If yours go broody and hatch, be prepared to get the chicks to an incubator or brooder if she quits mid-way through the process or abandons the chicks. HTH