In my experience, there is no need for a macerator pump. The pump that pumps the tank along the edge is often a macerator pump, but sometimes a diaphragm pump.

A pressure tank is an integral part of maintaining your well. Pressurized well tanks prolong the life of the well pump, avoiding the pump's rapid stop cycle and keeping the water pressure throughout the house.

A pressure tank is an integral part of well maintenance. Pressure well tanks extend the duration of the well pump by avoiding the pump's rapid ignition cycle and keeping water pressure throughout the house.

A pressure tank is not always necessary with a submersible pump. What a pressure tank does is to keep the pressure at the defined rate. If you do not need pressure to be kept within a defined interval, a pressure tank is not necessary.

Yes, they can work without a pressure tank, but in doing so, the pump will be used much faster with the bike walking and stopping. They install buried pressure tanks, for several reasons, which is perhaps what you have.