Here are a few options, depending on the level of formality you prefer:
Option 1 (Most direct and formal):
TikTok Implements New Measures to Combat AI-Generated Misinformation
Option 2 (Action-oriented):
TikTok Strengthens Efforts to Mitigate the Spread of AI-Generated Disinformation
Option 3 (Concise):
TikTok Bolsters Platform Integrity Against AI-Driven Misinformation