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Since these are nitrogen-fixing plants, they do not need fertilizer, with exception to a side dressing of compost, if desired. An abundance of nitrogen will cause little to no flowering and poor pod development.

Add bone meal. This will add phosphorus, which the plants need to produce flowers. These articles will help:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

This article might help: https://www.gardeningknowhow.com/edible/vegetables/beans/bean-blossoms-no-pods.htm

We've been hearing this a lot lately and we believe it's the weather. Keep doing what your doing.

This extremely hot weather we've been having is probably the main issue. Plant's don't like it either. Do however, check in an among the leaves for bean beetles. You can brush them off into a container of soapy water. You may have to do that daily to get them under control. Don't water overhead, deep water on the ground.
This article should help:

https://www.gardeningknowhow.com/edible/vegetables/beans/tips-for-growing-beans.htm

Your soil may need phosphorus. Phosphorus helps with flower and fruit production, and without it you will see a reduction in flowers and fruit. This article has more information:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm