If you’re someone influential enough to be blackmailed by the Chinese government and you’re using TikTok… You’re really stupid… but average TikTok user, really has nothing to be afraid of China, I think. TikTok is also after money, as far as I know (ads). They are a company. Like Huawei, they might have a close relationship with the Chinese government, similar with Google with the US government.
I’m a doctor so I know how dying people act. It’s unrealistic that a dying person, like a couple of seconds before he/ she’s completely gone, to talk much sense. They speak random stuff, disoriented, or in a complete panic state until they lost their consciousness and then die short after.