Aluminum Alloy Used In Apple Products

I'm curious as to which wrought aluminum alloys are used in specific apple products.

I've only seen more vague information, the 1st gen Apple Watch was produced with a 7000 series alloy, and the new Retina MacBook Air was produced with a 6000 series alloy.

The products I'm curious about are my current watch (Series 4), my iPhone XR, and my MacBook Pro (2018). The aluminums seem to vary from product to product, some are more malleable than others so I'd assume Apple has used thousands of different wrought alloys, but I haven't a real clue what they use in the products I've listed.

If I could get some help on this topic that would be amazing, considering im sure most people aren't even aware that alloy aluminum comes in many many different forms.