I dont get beard on my face and I'm totally feel shame on my friend circle on age of 20 tell me. What can I do?

Beard hair is a genetic trait. You should not feel ashamed about the way you were born.  Find a new group of friends who wont judge you.

Many young men want to accelerate their beard growth and ask
about it. It takes age (genetic triggers which occur in family lines) so
if you want to find out when your beard will grow out, you need to find out
when your father or grandfather started to grow theirbeard. Hormones should have kicked in
nicely by the time a man reaches 18 but he must wait out his genetics
as hormone alone are not responsible for the onset of beard grown. Beard
transplants can be done when the young man is a bit older (over 25) if the
beard has not grown in yet