Earlier quoted context omitted.
Out of those multistep process Apple has done very large part of designing Chip, designing OS to use chip optimally. Apple user market is not the one where they compare Mac with Wintel laptop. They find out M2 is crap in every way compare to Intel or AMD chip and then go on to buy a HP Pavilion or some such. Besides with Perf/watt gap Mac/Iphone and rest Apple can wait it out for at least a year or maybe even longer.
They bought companies that have designed chips for a DECADE, and then that took another decade of experience. And even if Apple went out and bought an old fab or global foundries it will take a decade to build out the capacity with a worsening economic crisis I'm not sure how realistic that is. But sure, it is possible.
Also worsening economic crisis will hit TSMC much sooner than Apple.