Based on the data we do have, there doesn't seem to be any reason to care about iPhone charging - so, if you don't come up with some data or rationale for why we should, then I still feel it's justified to say that this change has little chance of helping the world in all but the most minor of ways.
If 1W of gas fired power needs to be brought online in the middle of the night to charge your phone, then all the wind power gets the same price. That's why peaks have always been the most economical place to target investments.
It would be interesting to compare the charge rate of a Tesla Powerall * the number of them deployed. I can see iPhones alone winning that depending on some assumptions you make.
You'd then probably be able to find stats on what Tesla gets paid for providing that service to get some idea of scale.
You are the one making claims with poor data and assumptions, not me.
That is the entire point of this exercise. My point is that OP fails to address that with data (as do you).