Is there a non surgical way to increase my beard hair?

If you were not born with the genetic trait of having beard hair, there isn't much you can do to grow beard hair.  The only way to have beard hair is transplant surgery.

PRP/ACell injections may help. PRP (Platelet Rich Plasma) is blood plasma that has been enriched with platelets and contains (and releases) several different growth factors. ACell is a regenerative medicine treatment that uses the body’s own tissue regeneration mechanism to strengthen small hairs. It also stimulates the growth of new follicles through stem cell activation. The application of ACell + PRP causes miniaturized hair follicles to become healthier and larger, producing more robust hair growth. ACell activates follicular progenitor cells (adult stem cells) and PRP is loaded with growth factors that promote rapid angiogenesis and localized cell growth. PRP is great because it is platelet rich plasma from your own blood, therefore no risk for allergies. Also, PRP injections can be performed either with or without ACell, but typically we combine the two.

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