Honestly I saw this all the time at my old clinic. They give things weird names to make it sound like only they can fix it. Tbh you should get an x-ray from your actual doctor to see the real curve. A physical therapist can give you stretches to slowly work on it, way better than just getting cracked. Ngl that posture is gonna take consistent work to improve.
That sounds like a made up term to make a common problem sound fancy. A lot of chiropractors use special names for things to seem like they have secret knowledge. Your spine curving like that is usually just poor posture or a muscular imbalance. Might be worth getting a second opinion from a regular doctor or a physical therapist.