If she already has damage to the esophagus she needs the ppi's to heal it. I would get a second opinion from Mayo if you can. She needs to be on a low acid diet too. No spicy, fried, Italian,Mexican foods. No soda ever. No fruit juices of any kind. Stop eating 3hrs before bedtime. Stay away from highly processed foods which have a lot of acid in them.
Almond milk is alkaline so it's good to drink. Melon is good to eat. Baked chicken and turkey are good too. No seasoning except pink Himalayan salt which is not refined like table salt. Broccoli, aspergus, green beans, Lima beans, peas, Brussel sprouts. Sorry to hear she has this at such a young age.