Autistic toddler (undiagnosed) doesn't like baby brother

Hi all

I have a 22 month old girl who is showing many early symptoms of ASD. She is on the autism pathway and awaiting an appointment with the Community Paediatric Team. 

I also have a 7 month old baby boy. My daughter showed no/very little interest in him from when he was born. He is now crawling and trying to interact with her. She does not like this at all - sometimes she just removes herself but sometimes she gets upset and takes our hand and leads us to him so that we can move him.

Does anyone have any experience in this area or have any tips that can help her get used to him/bond with him. He adores her and is just desperate to play!