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?

Thank you for your question. I do not think Doxycycline or Retin-A will affect the hair transplant procedure. Please talk to your Hair Transplant Surgeon in addition to your Dermatologist. All The Best !

Dust exposure in a normal sense should be fine. If you have issue or concerns it is best to follow up with your doctor.

As you rightfully state: "it does depend on seeing your doctor since everyone is different".  In general you need to wait to see the transplanted hair grow out.  This takes 6 to 12 months.

If your doctor said your face is "inflamed", then it probably is inflamed. Follow your doctors recommendation.  If you are trying to seek reassurance, it is best to see a doctor in person for an examination.  Photos cannot substitute for an examination.

Moustache and beard hair (facial hair) is a secondary male characteristics that starts with puberty.  It is also genetic in nature and some men cannot grow a full beard or moustache.  There are no creams to make hairs grow.

You need to go back to your surgeon for a recheck. Photos cannot provide a diagnosis but the bumps and redness may not be typical.  It may be a sign of an early infection.