L.H.
My experience and knowledge about Feeding Therapy is limited. However, one of my niece's was born early as well and was given a G-button for feeding. Her story has more to it but she did begin to undergo therapy, never being able to feed orally. I don't mind going into her story but would do so privately.
Now...I am a Special Education teacher for 3 & 4 year olds and have many students over the years with feeding issues. I have had students who had feeding tubes at some point from birth to age 3 and some that came to school still with a G-button. The ultimate goal is for them to feed orally. I think many professionals will say that feeding orally has the most benefits when it comes to nutrition, physical development and speech & language development.
Therefore, I think feeding therapy has many positives and should be considered for your daughter. Best of luck to you and your family!