If you say that you haven't got any beard growth on your face, then I would consult with your doctor as no one here can diagnose a possible underlying cause as to why you don't have any beard growth on your face.

What is below if from: The Beard Community Bulletin Board FAQ

Not much, sadly. 90% of how your beard looks is determined by genetics and age, whether it's length, color and texture. However, good alimentation and grooming habits will help maximize what you have, keep the hair in optimal shape. Also, choosing the right style of facial hair can really help maximize the impact of your beard.
Facial hair is generally one of the last characteristics of physical maturity to develop during adolescence. Many physically mature guys don't finish developing a fully adult beard until their early 20s or even later. If you're still young, remember that your beard may continue to get thicker as you get older. Many guys notice their beards growing thicker, denser and faster when they enter their 30s and 40s. Give it time!

Some people might be tempted to use hormones or creams or treatments (etc) - to increase their facial hair growth. However, there is NO scientific evidence proving such products have any positive effects on facial hair growth speed, density or anything else.

For example, Rogaine is marketed as a way to grow hair on your head, but I don't believe it's been formally tested on faces. Keep in mind, this board is not meant to be a source of reliable information about this or any other medication. A medical doctor or pharmacist would be able to tell you more.