Opinions about body positivity movement

Idk if I'm being controversial or rude but I think body positivity movement is for everyone skinny People , fat people , people with disabilities , people with body dysmorphia , burn victims etc etc but I only see fat/obese people saying everything is fatphobic even not wanting to be fat is fatphobic and saying skinny shaming doesn't exist I don't know much about fatphobia because in my place fat=beautiful and skinny=skin and bones people make fun of me for that so whenever I see fat people saying that skinny privilege is real it makes me sad I'm not trying to make fun of plus sized folks you're all beautiful but only those who think that body positivity movement is for fat people and fat bodies are only normal bodies