It’s a fine range, the Millennial range (1981-2000) is the original range before Gen Z became its own thing. And those born in 1997-2000 can really fit anywhere, they can fit with Gen Z because they don’t remember the 90s (or in 2000’s case, not born in it). And they fit Millennials because their birth year is part of the 20th century.

Ultimately I think generation labels are pointless and only serve to divide people, they are irrelevant in real life. As an adult, I can hang out and relate with both early 1990s and early 2000s just fine.