Q.squash not producing
Our zucchini and yellow squash are full of bloom, but not showing any sign of producing. We had two of each kind and now nothing. Someone said they are all male plants. I have four of each. What is going on?

The first blossoms on the plants are generally all male flowers. The female flowers then open and can be pollinated and they are the producers.
https://www.gardeningknowhow.com/edible/vegetables/zucchini/growing-zucchini.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/tips-for-growing-squash.htm
Excess nitrogen could also be causing you to have nice green plants and little or no flowering.
A soil test can be done to determine if this is the case.
If you fertilizer, make sure you use a balanced fertilizer and do not over fertilize.