It looks like a tough job based on what I see on YouTube videos, passenger side engine mount has to be removed to get at the pulleys.
Perhaps it can be got at from underneath but since the car has this big aero panel mounted under the engine compartment I can’t tell.
Coolant appears to be leaking around the upper radiator hose inlet which is on the drivers side. Hopefully a fairly straightforward job, maybe just the hose, out in the driveway with it snowing every other day and below zero I’m sol dealing with that problem myself. Like a wheel bearing that went bad on it a few years ago, this car rarely has issues but when it does it’s in the dead of winter!
I did dig out the owners manual today and no mention on serpentine belt replacement intervals.