I think there's a lot to be said about the kind of pop culture you were immersed in, and how old your perceived peers were, in judging what generation you belong to. I was born in 1994 and also have nostalgia primarily for the 2000s, but the majority of my cousins are much older than me, which kind of anchored my childhood in a 90s mindset. Me and my younger siblings all feel much more like Millenials than Gen Z.
I'm '91 and I don't consider myself a 90's kid. I barely have any memories from that time, I'm way more nostalgic for early 00's stuff.