First, Apple has a history of dipping its fingers into several cookie jars simultaneously. They source from different suppliers to introduce supply chain redundancy and establish pricing power. This way, they ensure that a transition from a main supplier company to its competitor is always viable, because they build relationships and allow the competitor to generate enough revenue to stay active in that particular product segment. So even if Apple wants to make its own chips, it has a reason to do so at least in part with Intel as the IDM 2.0 push towards foundry becomes a reality.
Second, there are still some significant drawbacks to Apple's new machines. I want more external monitors, for one.
This is neither here nor there, but personally I think Apple should have spent $500 billion on its own chip fabrication infrastructure rather than doing share buybacks over the past ten years.