I don't think you realize how much money exactly AAPL has. Panasonic market cap is 33B. LG (which holds most of LG Chem) is 27B, a few miners for all the raw materials are all under a billion dollar.
With 1/4 of AAPL's war chest, it can buy enough "strategic holding" in ALL those key companies. Which can lead to 2 things: either wreaking havoc in the EV supply chain industry or business as usual. In both cases, Apple will get their EV made.
Tesla still holds a position as market leader, but then it would either have to go to war with a company that has a nearly infinite war chest (Apple revenue was 110B last Q and growing... that can finance their EVs play for a very long time). Why go to war at all in the first place? EV is a market big enough to accommodate many players. And by adopting a different strategy, say make a Teslaconn in charge to make 3rd party EVs, there are a lot of things to gain for TSLA as a whole in the long run to achieve its mission.
And disclaimer, I am long TSLA and hold no AAPL position and has no plan to do so.
I'm just thinking, there's no need for Tesla to be cocky against the 500lb gorilla that AAPL is. It can play along nicely until it too is a 500lb gorilla.