also for the record, it does pass the Bechdel test
Alma and Annamaria talk about the firewood the Creature gathered for them. or at least, they interact about it. Alma's name is only said briefly onscreen, but she IS a named female character who talks to another named female character about something other than a man
however, it doesn't pass the spirit of the test in its original context, namely: can you pretend these characters are lesbians? you cannot. they're mother and daughter. and the interaction in question is like five seconds long, and I think Annamaria says a few words at most, and it's background action to something else
and it's still a movie where there are only two MAJOR female characters, they never interact, and they both die before the end (to be fair, the dying is true to the book as well, although it's more like four main female characters and three of them die before the end. I do not actually like the book, but that's another conversation)
I feel like this highlights both the shortcomings of taking the Bechdel test literally and the importance of remembering its original purpose as well rather than Rules Lawyering it
(also to be clear I ADORE 2025 Frankenstein. I'm writing fanfic for it and I do broadly consider del toro to be a pretty decent filmmaker re: feminism. I'm just also aware of its...not shortcomings, I would say, because Elizabeth's and Claire's isolation in a world of men has a Point. but more what it does have, representation-wise, and what it doesn't)