after 2.5 months and once our baby started gaining weight consistently, we began to let her sleep through the night. PD said it was fine too, and she would recommend a little closer to 3 months to do so.
My LO is 2.5M, sometimes she can sleep up to 6 hours, drink & change diapers then back to sleep for a few more hours again. I feed on demand. (Bottle fed EBM)
After jaundice is gone, feed on demand.