I'm sorry I can't directly recommend a specific one off the top of my head. But like I said before, you should check out Fanfiction.net or Archive of Our Own. Just type in the relevant keywords and browse through the results. There are so many fanfics on these platforms that you're bound to find one that suits your taste.
I don't have a specific fanfic to point you to. But think about the potential of such a story. With Snape as a squib, his relationship with potions would be different. He might be more of an outsider looking in on the magical world's potions scene. A good fanfic in this vein could explore his jealousy towards those who can perform magic with potions while he can only study them theoretically. This could create a complex and interesting dynamic with Harry Potter in a wbwl setting. You'll just have to dig a bit deeper on the fanfic platforms to find one that does this well.
There are indeed such fanfics. In some of them, the idea of Severus Snape being a squib while still having a connection to potions in a wbwl scenario can lead to really interesting storylines. For example, he might use his vast knowledge of potions in a different way than if he were a wizard. He could be an inventor or a consultant in the potions field, and the story could explore how his squib status affects his relationship with the magical world and Harry Potter in this alternate universe.
One great 'wbwl harry squib severus potion fanfic' could be 'The Squib Potter'. In this fic, Harry being a squib changes the whole dynamic at Hogwarts. Severus Snape's role also becomes very interesting as he has to deal with a non - magical Harry in his potion classes. Another one might be 'Squib Harry and the Potion Master'. It explores how Severus helps Harry discover his own unique abilities even without magic in the context of potion - making.
One possible plot could be that the Squib apprentice, despite not having magic, has a deep understanding of the magical world's history and lore. Severus discovers this and takes the Squib under his wing. Together, they might uncover some long - forgotten secrets about Hogwarts or certain potions. As they dig deeper, they face opposition from some traditional wizards who don't believe a Squib should be involved in such important matters.
One common theme is self - discovery. Since Harry is a squib, he has to find his place in a magical world that he doesn't quite fit into in the traditional sense. Another theme is the relationship between Severus and Harry. Severus, as a potion master, might take Harry under his wing or have a complex relationship with him due to his status as a squib. Potions often serve as a medium through which their relationship develops or conflicts arise.
In this fanfic, Harry's life as a squib would be full of hardships. He is constantly looked down upon. Severus, as a potion apprentice, is trying to make a name for himself in a dark world. One day, Harry stumbles upon Severus's potion - making lair by accident. Severus is about to punish him, but then realizes Harry has an uncanny ability to sense the properties of ingredients without magic. This leads to them collaborating. They start by making potions to help the oppressed non - magical people in secret. As their relationship grows, they come up with a grand plan to overthrow Voldemort's rule, with potions playing a crucial role in their strategy.
There could be. Fanfic writers often come up with all sorts of unique ideas. In the wbwl setting, the normal rules are sort of thrown out the window. Harry as a squib would change his entire character arc, and Severus as a potion apprentice might have a different role in a world where Voldemort has won. It would be interesting to see how the writer would develop their relationship in such a fic.
The plot could revolve around the Squib Harry trying to find his place in a world dominated by Voldemort. Severus, as his mentor, helps him navigate the dangerous political and social landscape. For instance, Severus could teach Harry how to blend in among the Death Eaters and gather information to undermine Voldemort's rule.
One possible fanfiction could be where the Squib Harry is living in a very different Hogwarts under Voldemort's rule. Severus, as his mentor, might secretly be teaching him non - magical ways to resist the Dark Lord. For example, Severus could be training Harry in the art of stealth and intelligence - gathering within the castle, using his knowledge of the Dark Arts not to perform magic but to understand the enemy.
There could be many interesting aspects to such a fanfic. For example, the Squib apprentice might struggle with feeling out of place in a world full of magic, yet be drawn to Severus's knowledge. Maybe they learn non - magical ways to assist in potion - making or herbology tasks. They could also face discrimination from other wizards due to being a Squib, but find acceptance and purpose under Severus's tutelage.
I'm afraid I don't have a particular fanfic to recommend for this specific scenario. But when you search on fanfic platforms, look for ones with high ratings and good reviews. Check the tags and summaries carefully to see if it really matches what you're looking for. Some fanfics might be more focused on the relationship between Harry and Severus in this unique context, while others might be more about Harry's journey as a Squib in the potions world.