So rather than a call option C(S_t,t) we have some type of asset with asset price is given by S(x,t) where x is any type of variable that the asset price depends on. I.e Price of wooden desks, W(x,t) where x is price of wood. Or price of bitcoin, B(x,t) where x is price of electricity.
Could the FK equation be used if their PDEs were of the required format? Or does it only work will call options? I’m basically asking if we can find solutions to the price of the asset , not it’s derivatives