That it's a feat in 5e or not it's irrelevant; fact is in the lore of forgotten realms you have thousands of surface drow.
Perhaps I should explain further, but if there is a feat then it is not out of the question that drow would be on the surface and not feeling any adverse effects without the assistance of the tadpole. There are surface drow and there are Underdark drow. The surface drow have just simply adapted to being able to not have the negative of suffering from the effects of being in daylight as their Underdark cousins have to deal with. Regardless, I brought this up to help solidify the point that daylight adaptation is both supported by the rules as well as is a thing. Sorry for the confusion.
