Can’t claim to speak for all lesbians but I’m one and I’ve seen us simply ask that bisexual women, especially those partnered with men, please not use the word “gay” or especially “lesbian” about themselves or speak as some kind of authority about lesbianism, when they’re not lesbians. It’s not very helpful and not very appreciated. In the same way, I recognise that there can sometimes be some biphobia in play on the lesbian side, but that said, you’ll see far more mainstream thinkpieces about bisexuals feeling marginalised in the community than about how lesbians feel about any of this.
To be fair to Jack, she’s gone beyond simple identifying (*waves at many female celebs*) and at least she’s actually been in visible lesbian relationships and perhaps she did at some point think she was a lesbian (I personally have my own view as to whether the last of those is the case though…but I digress). She will still qualify for Pride awards. If she wins any, personally I believe it would be helpful to hear the word bisexual, pansexual or fluid or something encompassing dating men getting used about her, optimally by herself. I would respect and appreciate that.