Seven has always represented layered identities, and with Picard she finally gets to show us how far she's come.
intl.startrek.com
Okay, IIRC Seven in Voyager was, through the limited windows we saw into her sexuality as it wasn't important to her, as straight as an arrow.
She wanted to boink Kim on a misguided attempted at 'mating' early on, and by late series pretty much became addicted to a holodeck fantasy of her shacking up with Chakotay.
In the years post-Voyager, could she have discovered more about herself? Yeah, a good possibility due to character growth. Hell, girls who go to college or uni and discover they swing both ways is a stereotype for a reason.
But this article, this article and Ryan's own drinking of the Kool-Aid state she's always been bisexual, despite this not being a thing thought of in Voyager.
It also goes on to talk about how there was sexual-tension between Janeway and Seven, and that being assimilated is equated to transgenderism and the issues they face.
...uh, what? They're certainly not trying to push a narrative, are they?
For fuck's sake.