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There are definitely companies in the US that would do a prototype PCB for you, but at a 5x premium over the large scale operations in China and not much faster (or as fast as you want in exchange for a blank check). For a hobby project that is often not worth it.

Seems like he dealt with supply chain issues from the pandemic. Mentioned in the first minute of his video: https://www.youtube.com/embed/_xnCBslNjTs

When I used to work at a modular synth company (and was also building/designing lots of DIY synths) we would usually use OshPark, which are domestic, but it was certainly cheaper and quicker to use a service like JLCPCB from china.