As a chip supplier, I'd be feeling a lot of pressure right now. In the short term you can squeeze and the tail can wag the dog for a bit. But longer term this opens the door wide open for new competitors in the market and / or vertical integration.
Not really. Chip fabrication requires enormous upstart cost - IIRC, TSMC plans with something like 10-20 billion $ - and a lot of time, to the tune of three years at least (https://pr.tsmc.com/english/news/2033). There are not many companies in the world who have that amount of cash lying around, and even the ones who do like Apple still resort to using TSMC.
Not to mention it's not just the machines from ASML and a host of other vendors plus the cost of building factory-sized ultra clean rooms, but you also need the expert staff trained to operate the entire setup and a lot of fine tuning of parameters which are closely guarded secrets...