Weight gain, 32 weeker preemie

Hi mga Momshies! Pashare naman po ng weight gain journey ng inyong preemies. Mine is 32 weeker born Oct 2, bw 1.57 kg. He's now 6 weeks old cw 1.90 kg. 33 days in NICU, Nov 4 lang po sya nadischarge. Feeding nya ngaun is 1 oz every 2-3 hrs similac neosure then breastfed in between. I have low milk supply and because steady weight gain is crucial kaya napilitan ako magformula para makahabol s demand ni baby. Mabagal po ba ang weight gain ng preemie kapag naka-formula?