Not much room under the eaves...
There are roof louvers
Air Vent: Roof Louvers that can be added on top. Also the spinner-types.
It's a low-pitch, but you won't be worrying about snow.
For the main 2-bay, there are a/c powered venting fans that turn on at a certain temp. Solar too.
Those existing gable vents seem like it's not enough for hot southern sun.
Add a ridge vent at the peak, or louvers there as well?
Drill holes between the bays?
I don't know.