Sediment broken free in pipes has likely caused lower water pressure
I had a low pressure water line running under the kitchen floor of one of my rental properties.
Took the line loose on both ends.
Used a sump pump hooked to one end, and connected a garden hose to the other end.
Ran white vinegar thru it for several days.
It cleaned the line out.
Way easier than tearing the floor up to replace the line.