Is there such a way to "force grow" a beard with medication? i want to grow a beard to cover up hyperpigmentation, tried a lot of things already.

Won't work: Jay, you're just going to disfigure yourself if you apply anything to your face to try to grow a beard that you can't grow (it's genetic and not modifiable) and don't really want. If you have hyperpigmented marks from acne, get the acne itself treated & let the marks face on their own. If you're good-hearted and have good social skills, folks will like both you and your distinctive marks.