How do you feel about Lesbian flexible label? What does that even mean?

Is it even part of lesbian (homosexual!) community? Because if it includes attraction to men even minor, then it's a bisexual umbrella term I think? not homosexual

So is it like bisexuality with strong strong preference for women? Or what? I read it's definition on wiki before but it still sounds like bisexual term

I'm asking genuinely, not accusatory