Give it time she'll eat when she's hungry, my first would only a little at a time but he adjusted

Give her time. Babies bellies are very little at the age and only need very little. Formula also keeps them fuller longer. She will let you know when she is ready.

Get a syringe, feed her some, then hold her close and try again.

Dont stress it. She will take it when shes ready. Shes probably still stressed and adjusting to life outside. The nurses wont let you leave until they feel shes ready. Babies can also pick up on your emotions so if you stress about it she will too