It's not really that simple but you probably knew this anyways OP and just want to be a disingenuous retard
Gender Identity is influenced by a combination of genetic and hormonal factors that can influence your brain structure, and there are tests to determine or at the very least predict gender divergance from biological sex that impacts roughly 0.5% of the population overall
https://pmc.ncbi.nlm.nih.gov/articles/PMC6677266/

Pedophillia is a fetish for prepubescent humans that are otherwise not physically prepared for sex (it's also often confused for Hebephilia which is somewhat different)

So while Gender dysphoria and Pedophillia are both mental disorders, one carries a very different connotation than the other

Thanks for playing retard