Water Pressure Pump Location
If the PRV is adjustable (most are) crank it up! Normally turning the adjustment screw clockwise will increase the pressure. If you have a pressure gauge crank it to 60 most well systems I set up are 40/60  but city water I usually set 60 as a minimum. The increased pressure will increase the flow the pressure depends on the height of the tank but if you have 80 psi outside you should be able to get the same or a reasonable 60 psi in the home by increasing the Spring tension on the PRV (PRV is a fancy name for a pressure regulator they need to be made for potable (drinking) water systems but that’s all they are) increase the spring pressure and your pressure increases.