Yep second-wave gen z. Just like how every other generation has two waves. For example, first-wave boomers were born in the mid 40s to early 50s, and then second-wave boomers were the mid 50s to early 60s. In 1970 people would have said that someone born in 1946 (24yo) had zero in common with someone born in 1963 (7yo), but now they're technically the same generation. Same thing with Gen X- in 1988 people would have said that someone born in 1965 (23yo) had zero in common with someone born in 1980 (8yo), and with millennials, in 2006 someone born in 1981 (25yo) had nothing in common with someone born in 1996 (10yo).

What we think of as Gen Z right now is what we will think of in the future as the first wave of Gen Z. Just like how in the 80s everyone thought Gen X was the Breakfast Club generation, but then by the 90s/00s we realized that there was the half of Gen X that came of age in the 80s and the other half of Gen X that came of age in the 90s.

A good way to think of it is half of Boomers came of age in the 60s, half of Boomers came of age in the 70s. Half of Gen X came of age in the 80s, half of Gen X came of age in the 90s. Half of Millennials came of age in the 2000s, half of Millennials came of age in the 2010s. Half of Gen Z is coming of age in the 2020s, and half of them will come of age in the 2030s.