Well I, as a former citizen of China, do "speak out" against CCP as in family discussions, in online forums, and sometimes with classmates in school, but I don't "speak out" as in actually participate in protests. Demonstrations just isn't my thing. Protesting against CCP gets you labeled a "race traitor". I mean honestly, with all the racial problems in the US, and having to deal with my abusive family, I really don't have to energy care about CCP anymore. It's dead to me. I view China just like how an anti-fascist German view Nazi Germany. There's no point of protests. It's beyond anything a protest can fix. Like... why do I even care, it isn't even my country anymore.

Edit: Also, it isn't a conspiracy that ethnic Chinese (I'm gonna use the term "ethnic Chinese" because this applies regardless of citizenship status) people don't "speak out". People just value "Social Harmony" more than being correct. Like if you live abroad, why care about what happens back in China? Most ethnic Chinese people who lives abroad don't really feel welcome in their new country, so why be against your former country if you aren't even sure if you are actually safe in your new one? You don't end up in a situation where you have no safe harbor in the world. Ethnic Chinese people living abroad believe China will accept them again in-case their living situation abroad goes south, so they don't want to get on the bad side of the Chinese government. Like what happened with the Chinese Exclusion act in the US more than 100 years ago, and also the Japanese Internment Camps. Maybe you disagree with the thought process, but that is what most ethnic Chinese people think.