Identifying as non-binary vs. not identifying with gendered expectations

How do you differentiate the two? I was watching a video by Kat Blaque where she says that she thinks there is a big difference between not identifying with your AGAB and not identifying with the narrative associated with your AGAB. I heard this and now I have a bit of an identity crisis lol

I have never identified as my AGAB because of those narratives, does that mean I'm not non-binary? Isn't gender also informed by said narratives, i.e. did the chicken or the egg come first?

I personally feel much more comfortable expressing myself in more traditionally gendered ways after I came out as agender. So what the heck does that mean?