IIRC TikTok's algorithm penalizes potential influencers that aren't in the top x percentile of physical attractiveness. If you're below that threshold you're at a disadvantage.
For automatic promoting/demoting of users based on their attractiveness, Tiktok probably uses something like SCUT-FBP5500 but because it's part of their proprietary secret sauce this hasn't been confirmed.
[0] https://theintercept.com/2020/03/16/tiktok-app-moderators-us...
[0] https://www.cnbc.com/2021/06/25/tiktok-insiders-say-chinese-...