Two ways to remove anything off tiktok, the first way works every time,
1. submit a copyright takedown notice, use chatGPT to generate the letter, attach it on the page below, you may have to also attach a youtube or other social media ccount admin area showing you owned the video or images you want to remove.
So in Chat GPT "write me a takedown notice for my "photos or videos" from tiktoks platform as I own the copyright to them and they are my IP, "company name or Person"
It takes about 3 days for the material to be taken down but works 99.5% of the time.
link to submit the notice
https://www.tiktok.com/legal/report/Copyright?lang=en
2. the second way is with a bot called "REBOMB" its a easy install on windows, basically mass reports, but use the first method.