How much effect does seborrheic dermatitis have on hair growth / loss really?

Been battling seb derm for a year now and been on fin for 8 months. Funnily enough my crown where the thinning started has seemed to respond positively to fin but right above my hairline now is where hair loss is the worst, coincidently where my seb derm is the worst.

I recently did a scalp biopsy which did not show inflammation but minor miniaturization, and was done on the crown. The frontal portion of my hair is where i flake the most and i have a thick yellow crust along it and it hurts to touch.

Now my question, how much does seb derm affect hair loss? My scalp is not red but like i said it hurts, flakes, and crust buildup. Could this be a correlation or is it just a coincidence? Thanks all.