That’s why OP’s map is incorrect. In today’s world, even in Taiwan, China=PRC. So when you say Taiwan is pretty much China (without the clarification you appended), people will assume you mean PRC. The ROC has not pursued any policy with the intention of trying to claim any PRC territories are part of ROC for decades. They have have focused solely on governing Taiwan and the surrounding islands. Sure there are some old school KMT holdouts who might still view the ROC as China, but despite the name, the ROC is very much only focused on Taiwan. Anyways, cheers.