No, Taiwan has to import the machines, the spare parts, and even some of the raw materials from western firms. If China invaded Taiwan, they might get some engineers, and maybe some designs they had no hope of implementing anytime soon. The fans, if they survived, wouldn’t be very useful. There is a reason the west doesn’t tell China adjacent countries that they can’t fab due to risk of invasion.
And, “TSMC and ASML, currently, the only supplier of tools that could make cutting-edge 2nm chips, have added a ‘kill switch’ that will disable TSMC’s EUV machines remotely. According to Bloomberg.”
https://www.tomshardware.com/tech-industry/tsmcs-euv-machine...