"left behind" is a little vague but there's half-issues that affect women less because of historical sexism like workplace safety and stopped clock situations like education outcomes. Nobody was invested in keeping me in college or is interested in helping me go back and there is stone nothing for people at the intersection of whatever the fuck happened to me.

Certainly mens' liberation discourse is decades behind the rest of feminism, but that one at least is on men and people society treats as men to sort out. we have a bit of a free start with the "patriarchy hurts men too" writings if more of us would engage with it on that basis.