If you can access the middle of the plant you can thin out the leaf branches as needed to improved the air circulation if needed. Remove a few completely or trim some back by half as needed.

So much of adequate air circulation depends on local environment - dominant wind direction amount of wind/breeze, etc. - which is so different for all of us So if the amount of air circulation in your garden is minimal and prone to 'none' then yes some thinning will help. But if your garden is in an open area where there is a steady breeze blowing most of the time it is probably fine as is.

Dave

Aside from the general pruning or not pruning practice, I would prune the lower branches to allow air circulation under the plant and prevent rotting and possible soil born diseases. bacteria thrive and multiply in stagnant and moist environment. The top part also needs air circulation. A thick and tightly woven top would resist winds too and may increase the chances of plant tending to fall over, especially if it is staked supported by cheap cage.