There is no consensus on whether millennials are gender rebels or returning to tradition. Some experts argue that millennials are more tolerant of gender diversity and are more likely to identify as transgender or non-binary than older generations. Others argue that millennials are actually more conservative on gender issues than older generations and are more likely to believe in traditional gender roles.

There is some evidence to support both sides of the argument. For example, a 2017 study by the Pew Research Center found that millennials are more likely than older generations to say that they know someone who is transgender. Additionally, a 2018 study by the University of California, Berkeley found that millennials are more likely than older generations to believe that gender is a spectrum.

However, there is also evidence to suggest that millennials are more conservative on gender issues than older generations. For example, a 2016 study by the Barna Group found that millennials are more likely than older generations to believe that men and women should have separate roles in society. Additionally, a 2017 study by the Public Religion Research Institute found that millennials are more likely than older generations to believe that transgender people should use public restrooms that correspond with their gender identity.

Overall, the evidence is mixed on whether millennials are gender rebels or returning to tradition. It is likely that there is variation among millennials on these issues, and that some millennials are more tolerant of gender diversity than others.