My builder used wood beams about 15ft apart bracing that same section that bowed on you. We filled with 6k gallon water trucks. Took about 6 hours for two trucks. The beams stayed in place for two weeks after as things settled.
Does not look too bad. Coming off easily with wood skewer. Never showed any signs till I raised calcium over fear of gas heater. First cleaning since install. Install 2023 summer.
Just spent 2 hours cuz I am sick lazy and dumb. Added dry stabilizer with a bucket full of water. Chased stabilizer all over the pool as it does not break down. Follow the methods.