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Fans, belts, radiator, oil, (ironically) battery, (oil, fuel and intake) filters are eliminated.

Bulbs, tires, alignment, washer fluid, cabin filters, and brake pads remain.

I’ve owned a few EV’s and they all have 12V batteries. The traction battery charges the 12V and it powers all the typical car power systems.

Ah hmm, I guess you're right. So just the alternator and starter are gone.

While Teslas are required to have a 12v due to federal regulation they do not to my knowledge require any checking or maintenance. They’re basically unused in the car, you can’t even get to them without removing stuff.

Tesla uses a lithium 12V now due to problems with the leas acid one they used previously. So they are definitely used, most of the electronics outside of the power train are 12V.

True for now. Next generation architecture seems to be moving to 48V. This is expected with the Cybertruck and all following architectures.

Brake fluid also needs serviced. And EVs still have suspension so you'll eventually need new shocks. You also have power steering. And Air conditioning, including the condenser. (Some?) EVs also have radiators for heat management of the battery which includes a water pump.

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