ButeDance is a Chinese company responsible for complying with directives from the CCP. If one doesn't trust the CCP, then one should not trust ByteDance.
Facebook is American company responsible for complying with directives from the US Government. If one doesn't trust the US, then one should not trust Facebook.
How is this any different? The US is one of the Five Eyes countries. They routinely spy on their own people (see Snowdon et al). I see no difference between the two in this regard, other than the US has a court system that sometimes acts independently and has a Constitution that sometimes is followed.
> ByteDance has had a party committee since 2017 and is headed by CCP secretary and company editor-in-chief Zhang Fuping (張輔評), reported Human Rights Watch. Members of the committee hold regular gatherings at which they study speeches by Chinese Chairman Xi Jinping (習近平) and "pledge to follow the party in technological innovation."
> In addition, ByteDance on April 25, 2019, signed a strategic cooperation agreement with the Ministry of Public Security's Press and Publicity Bureau (公安部新聞宣傳局) in Beijing. The agreement was billed as "aiming to give full play to the professional technology and platform advantages of Toutiao and Tiktok in big data analysis," strengthen the creation and production of "public security new media works," boost "network influence and online discourse power," and enhance "public security propaganda, guidance, influence, and credibility," among other aspects.