You'll need a stronger argument to claim that something that almost everyone uses despite significant cost isn't essential.
And to be clear when you say essential you mean for everyone alive right?
Yes, grocery stores are essential. Yes, gasoline is essential, being the only source of energy for all long range transportation.
Yes cars are essential in many places where there's no good alternative. For example most of America, geographically.
I’m trying to establish what other industries are “essential” so I can try and understand how we regulate such industries and in what ways they are similar to the discussion here about Apple. If grocery stores are essential for example does that mean they should have to stock competitor store brand products if the competitor want to sell at that store? If I live in a town with only one grocery store and I want to pay with Bitcoin should they have to set up that payment mechanism? Should they have to accept all payment mechanisms? There are lots of questions here that you can open up that draw parallels with Apple here w.r.t being “essential”.
One of the many differences is that the duopoly of Apple and Google in mobile markets is effectively unbreakable without government regulation. Today there is no amount of billions you can spend to break their moat. In contrast, grocery stores are highly competitive because they don't have insurmountable barriers to entry. Anyone can lease retail space and sign up with a distributor. There are lots of independent grocery stores operating in many towns.
And for the record, governments have laws to step in when gasoline or food supplies become unavailable. And in the US, at least, being able to drive is seen as a right in the eyes of the public.