If she’s meeting all her milestones I don’t think it’s autism. with my son he also didn’t answer to his name but he was very behind on his milestones and still is for his age (just been diagnosed with autism) has she had her hearing checked? If yes and all is ok then just have a chat with hv about your concerns
So my oldest is 4 and this was one of his signs. He has to be called multiple times and/or be tapped to acknowledge someone talking to him. I’m not sure since there’s an age difference but my 3 year old is not autistic and responds to his name the first time it’s called. I would check with your pediatrician
You can talk to her pediatrician about it, and they can help you out with maybe getting her some evaluated