Any OTA update will happen in batch. Usually through STB serial nos wise. Also there is another factor which need to be taken into consideration. The STB needs to be in Stand by mode for Min 30 when the batch update is released.
kindly wait. Keep the STB in Stand by mode during night for another 2 days. It will happen.
After 2 days of initial roll out the mandatory update will happen irrespective of STB standby mode.