I am not saying an ICE is a better idea. I'm saying that an EV is, by some definition, unreliable from the drawing board onwards.
To really put the cat among the pigeons - does this make it, in a practical sense, less sustainable?
Largely the main issue is reliability has nothing to do with it. It is all producibility. Currently every car company is struggling with producing vehicles ICE or EV. Nobody is asking is the Ford Bronco sustainable? Even though the wait time is longer than the Ioniq 5. Vehicles that people are not as excited about like the Prius or the Bolt are available right now.
AFAIK the spray-in bedliner is a physical component.
Tonneau cover, depends on the model. Mine, there was a slight delay, but FWIW was a 'rolling' (i.e. no electronics) style.
Mud flaps, pretty sure are not electronic.
As another 'ancillary' item, wiring harnesses have been hard to come by, which has an impact on both ICE and EVs. Electronic, but not a silicon supply constrained component per se.
My point still stands - a dependency on electronics, and especially cutting-edge electronics, makes you dependendent on a complex and fragile global ecosystem.