I found the answer What kind of insect does a dragonfly eat?
Do Dragonflies Eat Wasps Yes, wasps are a common food for these insects. The dragonfly waits on a leave until the wasp is overhead and will then shoot from the leave to catch the wasp. They lock their eyes on their prey, and can adjust their flying speed within split seconds.

Dragonflies are interesting insects. They were among the first winged insects and some of the earlier species had wingspans of up to 2 feet. Here is Smithsonian article about them.

Interesting. I have both dragon flies and wasps near my house. I try to get rid of the wasp nests regularly.

I don’t know, but I hope so. I hate wasps.