Choco Pie and the new baby (long one, sorry)

Our daughter came home from the hospital on a Thursday, and honestly I was not ready for how Choco Pie would react. She is nine now, an Akita, very calm, very serious, the kind of dog who sits by the door and watches the road like she is the security guard of Bang Khen. For the first months of the pregnancy I kept telling my husband she will be fine, she is gentle, she loves children. Well. She loves children that she can see from far away. The first night the baby cried and Choco Pie stood up in the middle of the bedroom and just stared at the crib. She did not bark, she did not move. My husband wanted to take her out but I said no, let her see. By the morning she was lying next to the bassinet on the floor, with her chin on the edge. I think she decided that she is in charge of checking the baby every hour. The nurse who visited us said it is normal, dogs do this, they need a job. Okay. What I did wrong: I bought a lot of new things for the baby and did not buy anything for Choco Pie. So for the first two weeks she was sad, she did not eat much and she kept going to the old place where her bed used to be before we moved the crib in. Now I try to take her for a walk each evening, just around the soi, even if I am tired and the baby is screaming. It helps both of them I think. The walk gives me 20 minutes of quiet too. The juristic office asked me to keep her on a leash in the lift, which is fine. The security guard at the front gate knows her now and gives her a biscuit every day, which she accepts like a queen. Also, we bought the baby gate from Shopee for the stairs and Choco Pie figured out in one hour how to step over it. We gave up on it. Our daughter does not go up the stairs yet anyway. I am writing this because I read so many posts about dogs being jealous, and I want to say she is not jealous, she is protective. Big difference. Still, I would like to know from other mums here how you got your old dog to accept the baby. Any tips welcome, even small ones.