She is still young so I wouldn't stress too much, speak to your MCHN or paediatrician. If you are worried could try playing games where you hold dangly toys, etc near your eyes and when she looks give tickles, social rewards, etc. Continue to make silly noises and pair sensory with social, that way she will begin to explore people as well as objects. You may have to be over the top as it sounds like she can do these things she is just going to make you work harder for them! If you want feel free to pm me and I will send through some activities you can do with her to encourage eye contact, social smiles, etc.