And you do realize that not everyone is a Japanese culture aficionado?
Your point was that it wasn't clear that she was a 'she-wolf'. I pointed out that her name is female. Manga, as I'm sure you're aware, is written primarily for a Japanese audience, not a bunch of people reading scanlations on a website. The intended audience would've gotten it, hence removing the need for the author to 'clarify' or 'prove' her femininity. You could ask why the scanlators didn't put in a TL note explaining that the name was female, but maybe they assumed that most people would look at the character design and the 'yuri' tag and have the presence of mind to get it. Clearly, they thought wrong.
This story's focus isn't on the fact that they are lesbians, but that they are sheep and wolf.
And the fact that they are both female looks like a gimmick to make it look like less "predatory" (it's a wolf and a sheep after all). If it was a male, it would be less cute and more rapey.
Not exactly- the story seems to be using the assertiveness of the sheep versus the hesitance of the wolf for comedy, precisely to invert the predatory dynamic. It's even stated that wolves in-universe are treated with suspicion, and that our wolf-lead has something of a complex about it. Your argument would make sense if the wolf was dominant and aggressive and if the sheep was passive and afraid, but their actual dynamic is more-or-less the opposite. Using the appeal of lesbians to dress up problematic content is an issue with some manga, but it doesn't apply here, because the dynamic is largely positive and the point of the story is to break the assertive butch vs. submissive femme stereotype, using animal races for moe + allegory. So the gayness is not a 'gimmick' or a 'disguise'- it's part of the central appeal, both on the part of the author, who probably wanted to draw cute kemonomimi lesbians, and on the part of the readers, who appreciate them.
It's nice that lesbianism seems to be a normal occurrence in that world (are there even males?), but then, does it mean it's a yuri story, or just a story?
This is... a surprisingly good point, actually. However, the story's probably gonna focus on the central romance and the wolf vs. sheep issue, so the all-female cast is probably just gonna be something that readers take for granted instead of an attempt to explore the dynamics of lesbian relationships in an anthropomorphized society (though if it gives us non-science interspecies babies, it'll be totally worth it).
As for the question of whether it's yuri, I'd say that it is, since yuri is a marketing, demographic, genre-based and subcultural term rather than an in-universe phenomenon. Most characters in zombie fiction don't ever use the word 'zombie', but a movie about fighting an infestation of shambolic monsters that look like walking corpses would still be marketed and consumed as a zombie movie, regardless of whether they're powered by voodoo, bioweapons or a fungal infection. The term 'yuri' isn't something that people in real relationships use to describe themselves (imagine one guy going, "Oh, I'm yaoi for my boyfriend!" and you'll realize how absurd it sounds), but explicitly something that readers and consumers of fiction use to label and classify certain types of media.