My dependent son

Ok so my son is 2 little over 2. He is very dependent on me like everything he wants me to do.. I know obviously he depends on me because he is 2 but these things he can definitely do himself I have a 3 month old so half the time I just do it because I need to tent to her. I thought toddlers where suppose to want to do it them selves. Also if I ask my SO to do it our son says no no no mommy do it he wants me to do everything for him.. maybe it's because of the new baby. Idk just curious if anyone else has a child like this. He is so smart and can do things himself like pulling down his undies putting him seat in the toilet pulling up his pants doing certain things with his toys putting his socks and shoes on. He would rather me do. I have a niece the same age who is so independent.