Chickens may eat passionfruit, but it's not their absolute favorite.
While passionfruit vines thrive in chicken run soil, benefiting from the rich nutrients, chickens may or may not actively seek out the fruit as a primary food source. The provided reference states that passionfruit is harvested when it falls to the ground, and you may need to get up early to beat the chickens to it. This implies that chickens will eat passionfruit if given the opportunity, but it isn't necessarily their preferred forage option. Whether a chicken likes passionfruit depends on the individual chicken, what other food sources are available, and the ripeness of the fruit.