They must be devastated. I'm not sure if I could function in a situation like that. The parents seem strong and determined. I hope they find their daughter safe, and soon.
However it does not look good. According to her parents she has never wandered off on her own. She has difficulty walking so it does not seem like she could have gotten far on her own.
Authorities have not seen any evidence that she is lost in the jungle, as far as I can tell. If she did leave on her own I would think she would have been found pretty quickly.
It sounds to me like she was abducted. Imo