I was of the mind that the Nexus event here was Janet getting the virus. The events from then on (whenever it happened) played out the exact same because the difference existed in the quantum realm separate from everything else.My personal theory is that Cap signed the Sokovia Accords, which led to him still being an Avenger in this timeline. Due to the Avengers Civil War no longer happening, Peter is recruited in 2017. He also recieves a different suit.
Thor: Ragnarok plays out the same for the most part of course, because they're only affected by Earth business during the Doctor Strange cameo and Hela introduction. Thanos' assault on the Asguardians happened the same.
For whatever reason, Ant-Man and the Wasp happens slightly later in the timeline. It's fine.
I think Bruce ends up on Earth the same day, though.
What I think occurred here was that everything played out the same, but when the zombies took over, Cap and Iron Man made up and tried to fight them. I don’t think there is any reason to believe the Civil War didn’t occur