They could burn 200% of their savings and not make a dent: there would be no trying to save the company, most likely they'd just close up shop. For example, here's Tim Cook talking about the depth of China's labor pool in tooling engineers[1]. Basically saying that in the US, as an example, you could gather all the tooling engineers in the country and maybe fill a room. In China you could fill multiple football fields. For manufacturers, decoupling from that talent pool would take a multi-generation government-backed effort to train a minimal amount of domestic labor. It's not going to happen in a couple election cycles.
The company could persist, it would just have to look different. Apple's growth was not natural, enabled by high-margin hardware sales and high-volume service revenue. If both of those are going away, they need a pivot towards low-risk products that customers actually want to buy. More iPod and less Vision Pro.
It would be remarkably sad if America's largest tech company was rendered non-functional without Chinese labor to exploit. If Apple's fate is to close up shop without anticompetitive levels of market control, I guess they deserve what's coming to them.
[1] https://www.reddit.com/r/interestingasfuck/comments/123esqi/...