Q.Zucchini Squash Is Not Producing Fruit
What do I do? The plants are large, male flowers are blooming, fruit are about the diameter of a pencil, but don’t grow any more than 1 inch long. Blossom rot also occurs. Help!

Certified GKH Gardening Expert
If they are that small and they are falling off, it sounds like a pollination problem. These articles will help:
https://www.gardeningknowhow.com/edible/vegetables/squash/pollinate-squash-by-hand.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/creating-a-pollinator-garden.htm