This is the problem with Chinese apps. You just can't rely on them. They simply don't have the same principles of privacy like US companies do. Even Facebook won't do something like this.
Plenty of US companies build apps that do the exact same thing (checking your clipboard).
Do you like TikTok reading your clipboard?
I don’t even have a TikTok account. I simply pay enough to have realized a long time ago that the contents of the system clipboard are available to the application that’s in the foreground on pretty much every OS I’ve used. Hence I have no need to jump to pearl-clutching xenophobia over it.