I am glad that there is native manufacturing, but let's but that in perspective:
Apple doesn't publish units-sold figures, but Iphone revenue is 5x that of Macs [0].
The Mac Pro is the least popular Mac. Again, I don't have number breakdowns, but Apple did say in the most recent keynote that launched the M2 Macbook Air that the Macbook Air, and the 13" Macbook Pro are their 2 most popular models.
So it's safe to say the Mac Pro represents an extreme fraction of Apple manufacturing.
[0] https://www.apple.com/newsroom/2019/09/apples-new-mac-pro-to...