Trump would be all too happy to abandon Taiwan, and he's already abandoned Hong Kong, but hopefully his days are numbered.
As for the Uyghurs, I wrote a report about their plight. It's on such a massive scale, comparable in scale to the Nazi holocaust in the sense it involves millions of people affected in one way or another, the detentions are over a year and basically by quota (at least 1/3 people detained without question), incredibly abusive, and even if you aren't detained there are 100,000s of cameras and phone scanners and 10,000s of homestay security officers that literally live in their houses and "marry" the daughters (i.e., a state sponsored rape and race-cleansing campaign), etc. When problems are on such vast scales and multiple levels, you have to address them at a vast scale and multiple levels.
Pressure on the government I doubt would work. Educating the population isn't likely to work. Facilitating the escape of the population to other countries can only go so far. Targeted economic sanctions might help pressure the forced labor part, but the problem is the forced labor is so tightly integrated with the broader Chinese supply chain economy that it's almost impossible to tease out the Xinjiang contribution from the entire Chinese export market, and I doubt any country is going to just completely cut itself off from the Chinese market. Educating foreigners about it would be good for playing the long diplomatic game though. It's a problem from hell. I wish we could do more.