To mbc2302000,

This is incorrect.

The manufacturing process of OLEDs is extremely complicated and the underlying technology of the display comes from the manufacturer so that customers can benefit from economies of scale. This is why Apple is never specific about the technology behind the display except using the word “custom” because they are neither the designer of the technology nor the inventor; they are merely the customer and do not understand the technology (But they sure love tricking their customers into thinking they played a role in the tech’s development.

Apple just picks which display they want to buy and customize it a bit like how you would customize a pizza from dominos. None of the customizations are about the underlying technology; it’s just simple things like dimensions and color gamut.