Thanks for the query,
Beard and moustache may appear with a delay in few people.
However there are conditions where it may even not grow.
It is necessary to assess whether your hair bulbs are intact.
might be needed to observe the bulbs.
Please meet a dermatologist
for final diagnosis and treatment
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.