Ignore the Pediatrician. Call your state's (or county) Early Intervention line.
Does your daughter have limited speech?
She needs a developmental evaluation. It's never too early. Feeding issues are MAJOR. Don't "wait and see" with that. It's not normal.
My older son had the same issues. He was later diagnosed with Autism, but some of our first clues were his utter lack of desire to eat as a baby. He would not nurse, would only halfheartedly drink from a bottle, and never acted hungry. When it was time to do solids, he was okay with baby cereals and stage 1 and 2 foods, but he NEVER wanted to eat. We had to LITERALY sing and dance in front of him every mealtime to make him laugh and open his mouth, and we would stick the spoon in. EVERY bite, we had to do that. He ate stage 3 purees until he was almost 3. He could not handle any textures other than pureed, or dry and crispy (like dry cereal, pretzels, etc.) He would not even eat bread, no "slimy" fruits (only would eat granny smith apples, no skin).
In order to put some weight on him (he was UNDER the curve, weight wise...), our doctor had us mix up pureed avocado, full fat vanilla yogurt, and honey. He used to LOVE this, and ate it up...really helped put some weight on him too. This sounds crazy, but I used to make him macaroni and cheese and PUREE it with some milk and he would eat it like that. Macaroni and cheese (in its regular form) is now his favorite thing to eat, still.
He is 6 now. He still has some issues with SOME textures ("powdery" stuff like potatoes, large lumps like oatmeal, and "slimy" foods like canned fruits he cannot handle). But, he has gotten much better with a lot of therapy.
But, at 6, I admit that he is STILL eating "baby" food. He still eats baby oatmeal made with milk and a stage 2 fruit puree mixed in on occasion. It's because he likes "oatmeal", but not the texture of oatmeal.

But, he also eats regular boxed cereal with milk and other things too. He asks for the baby oatmeal when he is not feeling well. Probably more of a comfort thing.