Prickly pear gives plenty of blooms, however once the blooms are spent they don’t produce any fruit.
Plants are three years old
Certified GKH Gardening Expert
This is usually due to a lack of fertilization, but I am also in zone 7 and it took mine 6 years to send the first fruit out! It is likely that the cultivar is only barely hardy in our area, and will take a lot longer to bear a fruit.
This article will give you information on the general care of opuntia, or the prickly pear: https://www.gardeningknowhow.com/ornamental/cacti-succulents/prickly-pear/opuntia-cactus-varieties.htm