a 7805 is not a mosfet…. It’s a 5v voltage regulator; there is a significant difference between the 2.
Also, in the pictures I see, that driver board is missing a lot of important components; unless they hid them under the board like ninjas, that will only be able to regulate voltage, not current… Odds are, that driver will burn out your laser very quickly. Just sayin’…
And then of course, there is the fact that Nichia does not make a 2000mW diode… so there’s that…. ….