Zone filling confusion

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I made pin 7 as GND. Is that better?

Is GND plane required on only one side of the board?

[image] W.R.T this case…if I place the tracks(Green) on the other side making it red, i might be able to cover up the board with GND place on one side but it may cause issues on the other side but is it required to make GND plane equal enough on the other side?