At this point it is crystal clear that you have absolutely no idea what you're talking about, but I'll potentially waste some more time to type information that I believe are the most important to rebate your most wrong/insane claims.

First, you seem focused on Taiwan’s recent history (perhaps influenced by what you’ve seen regarding Hong Kong since 2019?), but Taiwan’s history is actually a lot longer than that. You can use this Wikipedia link as reference going forward if you at all plan on stopping being a non-sense-spewing piece of trash, but considering how that was just 1 Google search away from you and you still didn’t manage to do it, I don’t have hope for it.

Taiwan, much like the vast majority of East Asia (if not all of Asia) is not as diverse as the US, so your bullshit about Taiwan being ethnically Chinese is the same as the US being ethnically British is a great sign of you being completely clueless about what the hell you’re talking about.

Over 90% of its population is reported as Han Chinese by its own fucking government, so it is clear that there is absolutely nothing wrong with me saying that Taiwanese people are ethnically Chinese, while it is completely wrong for you to compare that statement to the bullshit that Americans are ethnically British. There are Americans who are, but that’s only one of the many minorities in that country. Meanwhile, 90%+ of Taiwanese people are Han Chinese, so please stop your nonsense.

Second, another useful link for you. Go read it. I don’t claim to be any sort of expert in Chinese/Taiwanese history, but I know enough to not state trash like you have been. Taiwan as we know it today is vastly the result of mainland Chinese people migrating to the island over political situations that happened less than 100 years ago. This fact adds even more credence to the point of Taiwanese people being ethnically Chinese.

And finally, as others have already told you, Taiwan calls itself Republic of China.

I hope you learn how to find answers to your confused mind before you speak and especially, before you attack others due to your own ignorance.

You have a nice life.

Taiwan has been independent from the mainland since 1949. That's 74 years. Were people in the US in 1850 ethnically British? Largely yes, and that's with the US recieving massive migration from other countries, which Taiwan has not had.

The Taiwanese people speak Chinese, practice Chinese cultural traditions, call themselves the Republic of China many even to this day support reconciliation.