On stuff like controls, I usually tend to the KISS method if possible. No power used, no Bluetooth or wireless, so electric valves or blowoffs to leak or fail, no electronic pressure sensing, etc. As mentioned earlier, a single dual needle gauge with two fill/bleed paddle switches like this one from Airlift. Ours is Firestone, I think, but the same thing.
https://www.airliftcompany.com/shop/26229/
If you choose to it can be dash mounted, which I have seen fairly often, but we put ours in the rear of the driver side pod. Protected by convenient.