There's many companies that have reproduced the tictok algorithm. Surely if it was sold, the multibillion dollar company would have no issue with that aspect.
Facebook Reels and Youtube Shorts have pretty good implementations at this point, especially facebook, it is kind of scary. But I didn't use the original TikTok app so I don't know if TikTok is somehow better than these (I only started watching them because they started placing them in my Facebook and Youtube feed, sneaky!).