Baby uninterested in eating

Kc • 27-married-Ohio
My twins were born 36+2 so really just late preterm. They were a decent size when born 5.7 and 5.11 pounds but have both lost quite a bit of weight since then because they have zero interest in food. We are obviously working closely with their pediatrician to solve the issue, but does anyone have any tips or tricks to get babies to eat!?