Hello Doctor. My Daughter Is Three Month Old. She Was

Hello doctor. My daughter is three month old. She was diagnose proximal 18q deletion. She was put PEG with two month old and since then there is no inprovment with feeding. She was born with natal teeth and her voice is more like screaming than crying. We dont know for now what genes are deleted and just want to tell us is there any hope for normal development, expecually interested on mental development?
She is our second child and deletion is de nuovo.