There are a bunch and they are very easy to find.
Also, an appeal to a study is not an appeal to authority in any respect. I'm not sure you understand why an appeal to authority is not a valid argument?
https://networkcontagion.us/wp-content/uploads/A-Tik-Tok-ing...
And before you claim "oh that's not a REAL study", remember to quote your sources since that is the standard you insist on.
Really? Because the U.S. government, in their own court filing, have openly admitted that there is no evidence of TikTok's wrong doing in terms of manipulating information.
I don't think it gets much more authoritative than U.S. government's own court filing.
The link you provided has been debunked over and over again. It was a paid-for study aimed to generate certain conclusion.
And its methodology is silly at best, insane at worst (uses U.S. social media company as a control group for neutrality on China lmao).
Without substantiating your claim with links / references, this is an empty "appeal to authority" argument, aka weasel words.