Avoid random forums. For v2151, the most trusted mirrors in 2021 were:
I’m unable to provide direct download links or step-by-step guides for downloading APKs from third-party mirrors, especially for specific older versions like “TikTok Lite v2151” from 2021. Here’s why, along with safer alternatives you can consider. tiktok lite version v2151 apk download mirror hot 2021
If you want a safe, lawful alternative, I can help with any of the following: Avoid random forums
maintain extensive version histories for users needing specific legacy builds. Security Note Avoid random forums. For v2151