My daughter has been saying mama sense she was 4 months old but I've only heard dada a couple times.... I am trying my…

My daughter has been saying mama sense she was 4 months old but I've only heard dada a couple times.... I am trying my best teaching her to say dada really nothing when I say dada she says mama instead or when she wants her bottle she with say baba and say ya and tries hi sometimes she is going to be 8 months old me and her dad are co parenting. I just feel kinda bad because he's not really around much he is trying to get 50/50 custody but it's been 4 months and it's not really pushing it like he should.. also he has a gf now and she basically take her of Sophia when she is over with her dad her dad doesn't do much when he is suppose to be up with her in the morning he's not he's sleeping and his gf or mom has her it's sad I feel he's only getting 50/50 so he doesn't have to pay so much child support and also so his mom can see her more it's sad that he doesn't really pay much attention to her just his gf and mom does 😢 hurts me to see that because she will see this one day and it might hurt her I hope he changes soon and takes care of her more.