My speckled Butter bean plants aren't producing any beans but they are really healthy plants.
Speckled Butter Bean Bean Plants Have No Beans
Certified GKH Gardening Expert
Too much nitrogen fertilizer will prevent pods from setting and focuses more on producing foliage growth. Heat can also be a factor, making pollination more difficult. This article might help: https://www.gardeningknowhow.com/edible/vegetables/beans/bean-blossoms-no-pods.htm