Here are a few options for a formal equivalent, depending on your focus:
Option 1 (Direct and authoritative):
Leaked Audio Linking President Milei to Disinformation Network Sparks Controversy in Honduras
Option 2 (Emphasizing the denial):
Allegations of Disinformation Network Ties to Milei Denied Amidst Audio Leak Scandal
Option 3 (Concise and professional):
Controversy Erupts Over Alleged Links Between Milei Administration and Honduran Disinformation Network
Recommendation: Option 1 is the most standard for professional journalism, as it clearly outlines the subject, the conflict, and the geographic context.