Pheobe was last seen on May 15 before she failed to board a flight from Bundaberg to Perth.
Today, her mum Kylie Johnson issued a heartbreaking video statement, urging anyone with information to come forward.
“This is a pain no person or family should ever have to experience,” Johnson said.
“Pheobe was a beautiful, loving, kind person, and everyday not knowing where she has been is devastating for us.
“This is why we’re appealing to anyone with any information that may help to bring Pheobe home, to contact police.
“Even the smallest bit of information may be all the police need to find Pheobe.”
Police say Pheobe’s housemates Tanika Bromley and James Wood were the last to see her about 8.30am on May 15, when they claim they dropped her off outside Bundaberg Regional Airport.
They’ve both since been charged with unrelated weapons offences.
Their home in Gin Gin has been declared a crime scene, and a grey Hyundai has been seized.
Detectives are still appealing for vision or sightings of a grey Hyundai ix35 in the greater Gin Gin area between May 15 and 18.
“I know that this investigation isn’t over. It will not be over for me until we find Pheobe,” Johnson said.
“I still hold hope that Pheobe will come home, but I have to consider the possibility that she also won’t.
“If the worst-case scenario has happened, I at least need to know where she’s resting. I need to know where Pheobe is.
“My daughter wouldn’t just disappear. Someone knows something and as a mum I’m asking you to come forward with your information.”
Police say they continue to “run out several lines of enquiry”.
The greater Gin Gin area remains the focus of the investigation.
