See e.g. https://networkcontagion.us/wp-content/uploads/A-Tik-Tok-ing...
"The conclusions of our research are clear: Whether content is promoted or muted onTikTok appears to depend on whether it is aligned or opposed to the interests of the Chinese Government. As the summary data graph below illustrates, the percentages of TikTok posts out of Instagram posts are consistently range-bound for general political and pop-culture topics, but completely out-of-bounds for topics sensitive to the Chinese Government."
It's not even theoretical. This is happening now.