The spoilers on the 737 Max are fly by wire. https://www.intelligent-aerospace.com/commercial/article/16542680/boeing-adds-flybywire-spoilers-electronic-bleedair-system-to-nextgeneration-737-max-jetliner-to-improve-fuel-burn
Then the 737 has boosted hydraulics for flight control surfaces?
Yes, hydraulic actuatores power the rudder, elevators and ailerons, thru cable inputs from the control column and rudder pedals. There is a mechanical connection between the cockpit inputs and primary flight control surfaces. On a fly by wire aircraft, the connection between cockpit input and primary flight control surfaces is electronic. Same design as a FADEC engine versus a throttle cable engine.