Any moves Apple made now would wind their way through ASML et al., through fab construction and qualification, and then finally adapting their chips to a new process.
They could pull the trigger on the Power to Intel because they'd spent a decade+ of contingency planning, OS/app support, and acquisitions.
This isn't like that.
https://www.bizjournals.com/phoenix/news/2022/05/26/tsmc-pho...
They’re probably not hiding something like that in Cupertino.
Maybe it's unrealistic but it wouldn't be the first time something like that happened in a market. The political conditions aren't unfavorable either.
TSMC has a market cap of $356B and maybe $30B in cash. Apple has a market cap of $3.25T and over $200B in cash. Surely you are overlooking a possible option here, which is Apple acquiring TSMC. I don't see it as likely, but it is an option.
This is a guaranteed route to introducing even more delays, cost overruns, schedule overruns, onerous requirements, intrusive oversight, and about a trillion meetings and studies along the way.
If you want to go fast, stay far far away from the USG.