In some of the runs I see people run straight to the breakers and flicking a certain color and typing in the vault code without having actually done the work to get the vault code. I'm just wondering how is this possible?

When I do a run myself I don't have any of these things and even when I restart the level ( vote restart heist ) I always get something different in terms of layout, location and code etc. I tried to look online for "fixed seed" and things like that but I just can't find any information. I'm guessing these players just resetted every time until they get the perfect map / seed?