“Information such as user location, device type, and various hardware metrics are combined to create a unique "fingerprint" that can potentially be used to track a user’s activity on and off the app.”
TikTok’s web app runs its tracking code inside a custom virtual machine so nobody can read what it collects. Honest companies don’t need to hide their telemetry behind an interpreter. The obfuscation is the confession. Someone had to tear it apart to see what it sends.