If you never questioned, you are then most likely cis. But trans people start questioning it at like 5 or 6 years old. A lot will not find the answer before a long time. Me, I hated my body, hate when people said how much a handsome man I was, I was questioning myself but only find the answer at 16 that I was in fact a trans girl. The vast majority of people are cis so they never question their gender, simply they don’t need to do that