Apple did not help them design the CPU/Architecture, that was a decade of design and manufacturing already, they VC'ed the independence of the CPU. The staffing and knowledge came from Acorn.
I believe they had a big hand in ARM64. Though best reference I can find right now is this very site: https://news.ycombinator.com/item?id=31368489
They had the Newton project, found ARM did a better job than the other options, but there were a few missing pieces. They funded the spun out project so they could throw ARM a few new requirements for the CPU design.
As a "cofounder" of ARM, they didn't contribute technical experience and the architecture did already exist.
There are nearly 2B smartphones sold each year and only 200M laptops, so Apple's 20M laptop sales are basically a rounding error and not worth considering.
As 15-16% of the smartphone market, Apple is generally selling around 300m phones. I've read that Qualcomm is usually around 25-35% of the smartphone market which would be 500-700M phones.
But Qualcomm almost certainly includes ARM processors in their modems which bumps up those numbers dramatically. Qualcomm also sells ARM chips in the MCU/DSP markets IIRC.
You think Qualcomm is larger than Apple?