Moms to premature babies 34-36 weeks (feeding)

My baby was born 35+4 at 5lbs 11oz but of course dropped a few ounces. He had issues with feeding in the hospital. He wasn’t drinking the Oz they wanted him too (30oz every 3hrs )but God stepped in and my milk supply increased. He did a 180 overnight! So we was released together after 3 days. He’s 36w+1 gestation today (4 days old today) and even gained weight in his cheeks but Couple questions

If you formula or breast fed, how long did it take for your little one to gain 1-2 pounds after their arrival? With feeding

Did they improve with their feeding over 1-2 weeks after their early arrival?

Anything that worked for you that helped your baby improve with their feeding and the appropriate weight gain?

Chime in! Also he’s strictly breastfeed. Formula does not work for him.