Puberty takes time
is a transition period marked by a series of hormonal and body changes in both sexes.
Some are obvious, like nipple growth in females & some are hidden, like testicular swelling in males. The transition can take from around 2 to 5 years. Reproductive ability requires ovulatioon for females, which can occur with the 1st period but often up to 1yr later. Males are capable mid process.