14 month old barely eats solids

My daughter has never been a big eater when it comes to solids. She has certain foods she loves like those baby Cheeto things from Gerber. And puffs. But anything else she hardly touches. I’m starting to get concerned. I breastfeed her and I’m sure that’s where she gets the bulk of her nutrition.

A few things about her, she deals with eczema and some occasional random vomiting that seems to accompany a small dry cough. When she does vomit it looks like a bunch of thick saliva or mucus along with breast milk, etc. She also isn’t gaining weight really.

I’m just looking for people with similar stories? She has an allergy appointment coming up and hopefully that gives answers.