Unregulated residential ...

Unregulated residential booster pumps can cause negative pressure in the residential distribution network.  This can cause leakage into the network of whatever water surrounds it.  In the worst cases this could draw in raw sewage or other hazardous waste.

The reduction in local pressure can also mean that neighboring properties are forced to install booster pumps, leading to an arms race.

I'm not an expert, but a type AB air gap (https://www.wras.co.uk/consumers/resources/glossary/type_ab/)  followed by a water tank from which the booster pump is fed should resolve pressure issues (as long as water is available) without detriment to the local network.