According to the Samsung Store it is developed by developer 'Good Lock Labs'. According to this Wikipedia source [0] they developed this app 'in cooperation with Samsung'. Browsing through the sources I did find a 2016 article from Samsung themselves [1] about Good Lock, indeed confirming it is theirs.
Also, it looks like Good Lock is now also available on the Google Play Store, and there it lists Samsung Electronics as the developer [2].
I guess this does make it less sketchy of an app to use, but it still feel wrong to have to do so many weird steps to get a menu option working.
It lets people who want to tinker do it, while keeping people who probably shouldn't tinker from doing it.
It's not available in the Google Play store because the play store rules are really stupid. A lot of apps aren't available there.