I searched too, and couldn't find any news-related info. Just Youtube, Tik-Tok, Facebook, Instagram, etc.
When I queried AI, this was what I got:
"The story of a hiker named "Kelly Brooks" disappearing in Yellowstone National Park and reappearing years later is a viral internet hoax. There is no official record of a real person by that name in a case matching the widespread social media narrative.
The story, often shared on platforms like Facebook by pages using clickbait tactics, typically involves an 18-year-old vanishing in 2014 and reappearing in Cody, Wyoming, seven years later with a shocking story. Fact checks and internet searches for official police reports or credible news articles yield no evidence to support this specific event.
The narrative is a work of fiction designed to generate engagement, often blending elements from other real, unrelated missing person cases or actual tragedies in and around the park, such as the unsolved 1982 disappearance of Kelly Dove from a Virginia gas station, or the death of Colin Scott who fell into a thermal feature."