Deepfake detection competitions serve to discover the most effective ways of identifying fabricated media and preventing potential threats associated with them.
In order to spread awareness on deepfake harms and find creative countermeasures against it, deepfake competitions were organized in the USA, China, Singapore, and European countries: during the Irish Young Scientist & Technology Exhibition (BTYSTE), a novel deepfake detection method was proposed by a school student, which debunked the fake Queen’s speech with a "94.3% confidence".
You can read more here - https://antispoofing.org/Deepfake_Detection_Competitions.