I planted transplants in my raised bed garden last May. Didn't realize this was crazy late here in AZ. I have summer squash, eggplant, okra, cucumber, cantaloupe, bell pepper, hot pepper and basil. I've also snuck in one mint plant in a buried clay pot. Everything looks great but no veggies yet. Dealing with the blossoms dropping due to the heat. I have struggled getting consistent watering down but a soaker hose has saved me from drought. However, for awhile plants wilted daily even though they were watered twice daily. I'm wondering if even though plants have a lot of new growth and look great if they might still be great producers this fall? What can I do to baby them? They are shaded throughout the day.
Usually if your losing fruit prematurely off the vine it is related to poor pollination. Blossom end rot is possible also. Do you see browning or issues with the ends of the vegetables? You may want to water late am if possible.
Seeing bees is a good sign, but they may not be getting the job done. I would try hand pollinating your plants and see if your result change.
Here are some links to help.