but I'm wondering if there's any room for a higher or lower current.
Current is pulled by a device. The power supply for that device has to be able to supply, at a minimum, the current required by that device. Otherwise, the device may not work properly.
Think of a car starter and a weak battery.
Having a 500A power supply for a 200mA device is not a problem. Well, affording one might be, but using one won't be.