Need advice please

My son is 2 and a half and I’m a little concerned about his knowledge and development.

He Can’t say his name properly

When I ask questions he repeats what I say for example ‘how old are you’ he says ‘you’ I say what’s your name he says ‘name’

He knows his colours, animals, fruits numbers etc he says most words well but isn’t interested in learning new things. When I ask questions he quickly gets bored and wants his dummy back. I know what he’s saying but others don’t I have to tell them what he’s saying. He has a lot of outbursts and if he doesn’t get his way all hell breaks loose. I have a newborn also but this has been going on before he arrived. I try and give him as much attention as I did before I had my new baby. Is this normal or should I be concerned? I understand every child is different I’m just wondering if he’s where he should be at his age. I’m still waiting for his check up with the health visitor which was meant to be 4 months ago.