You are jealous of the baby and the other friends and are demanding one to one time with her citing her not being attentive enough and not being a good enough friend to her.
You also dodged the question about whether you had kids. It fairly clear you don't.
You say you value the friendship and yet it's all me, me, me in your posts. You say that she's being rude for not giving you enough attention.
You just sound incredibly controlling, needy and immature. If a man said these things about a woman, they'd be posts about red flags. You are not behaving in a healthy manner.
There is no comprehension that her priorities and responsibilities have changed because she's entered another life period. You have to change and adapt to that - it won't be like before, that doesn't mean she doesn't care, it means it's just different. She has other friends who she has different things on common with and perhaps gets support and encouragement from them which you can't give because you are too wrapped up in judging her for not doing 'adult things'. Newsflash she is doing adult things, that's what women with children do. That and run around with no time to indulge on adults who demand the absence of children. Because time is so precious.
If you don't like that and can't adapt to that change, it's for you to deal with. It's a you problem not a her problem.
You'll either have children of your own in time and realise this or grow older and childless and realise this isn't her being rude and selfish - it's just how life and priorities change when having kids and it's the most normal thing in the world and it's not rude or selfish at all - just two people on different life paths and with different things in their lives now. The common ground has merely lessened.
It's just how things are. None of this necessarily means she loves you less.
There's friends I've drifted apart from over the years for many reasons. A few I love dearly and would love to see again. But honestly I just know that life has moved on and that moment has gone.
Focus on your life and your future. Not trying to control her and her life.