How did I obtain a neck hump over quarantine, and is it reversible?

So over 2020-2021 quarantine where I was doing online school I developed a neck hump. I also gained weight and practiced bad habits like slouching.

I heard that it’s because of my bad posture, however I recently found a doctor online speaking about people don’t get neck humps from bad posture, but from genetics.

I’m not sure if this is true, but I am extremely self conscious about my neck hump and is constantly getting neck, shoulder, and back pain.

Luckily it hasn’t gotten worse since 2021, but I would still like it gone. If anyone has more info on this, please share!