Husband addicted to phone

I am 30 weeks 6 days pregnant and for as long as I can remember my husband has never been able to get off his phone and I’m starting to worry now. I feel like I am invisible to him we can’t even go out to to walk the dogs without him being on his phone. Now when I looked it turns out he is playing a game on his phone but it’s constant. I wake up in the morning roll over and just see the back of his phone, I come home from work and there he is on his phone. I cook for him I clean the house I do everything for him but now I’m worried because I’m so scared nothing will change when the baby is here and he is going to be the same. I’m frightened he isn’t going to help feed her or do anything with her. This phone addiction is getting me down now and I feel like maybe I should leave him. If I do confront him and ask him to get off and spend some time with me he huffs and puffs at me like a child would and 2 minutes later he is back on it.

Any advice ?