I'm already 22.. still no changes of me?

I'm kinda skinny but same time a bit curvy and has flat chested... *some people mistook me as I'm still 16 lol

I eat a lot but I never gained weight? ( I also have thyroid so... which is why my metabolism is fast.)

But..
I'm taking some medication for my thyroid already but still no weight is improving...

Is this because of my genes?

I was a late bloomer by the way.. is this possible?

I need ur advice... thanks
I'm already 22.. still no changes of me?
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