You may be able to add a ridge vent to the top peak there. https://www.homedepot.com/p/GAF-Cobra-Rigid-Vent-3-9-in-x-48-in-Roof-Ridge-Exhaust-Vent-in-Black-2035000/207045172
If you open up the area under the gables like suggested, a roof vent can allow the air to escape upwards.
I guess it...