Not a medical episode and ruled an accidental drowning...
https://www.wgal.com/article/hersheypark-girl-who-died-identified-sophia-subedi/65529313
"Multiple witnesses who said they were at the boardwalk at the time of the incident said they thought the lifeguards lacked urgency when responding.
In a statement, Hersheypark addressed these claims, saying "it is very unfortunate to hear the negative speculation regarding our response, which is categorically and provably false."
The spokesperson for the park reiterated that the lifeguard response was immediate, professional and consistent with their training."