They have good growth and plenty of blooms, but the blooms do not develop into peppers.
My Bell Pepper Plants (2) Are Not Producing Peppers
Certified GKH Gardening Expert
Normally, this signals a problem with pollination. The high heat and humidity in many parts of the country has been affecting pollination. Or, it could be plant pollinators are having trouble getting to the plants. Peppers and tomatoes are identical in how they pollinate so you can use the information in this article to hand pollinate the flowers:
Also, if you are seeing blooms or fruit but they are dropping, this article will help: https://www.gardeningknowhow.com/edible/vegetables/pepper/pepper-blossoms-falling-off.htm