Wall outlet discovered to only use one white and one black
There is no reason to question these connections. Four hots in the same wire nut and four neutrals in another wire nut is perfectly acceptable. All this means is the the incoming line feed (one black hot and its accompanying white neutral) is connected to two other outlets besides the receptacle in this box.

The old red ScotchLoks I have are rated for 2 to 4 #12 wires.