Somehow I feel weird that one bathrooms water pressure is quite strong eg shower, sink, toilet.
But in another room the pressure seems quite so so, especially the shower heater. The sink and toilet I can feel it’s softer than the previous room I mentioned.

I thought water is controlled by the main pipe? Turning it off turns off the whole unit. So why is the water pressure different between rooms? I want to know if it’s something that’s controlled by some pumps by management besides the main pipe

Does the water go through any external pumps that’s different between rooms so that could be a possible reason?