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.
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.
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.
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 great fanfic is 'The Prince's Tale Continued'. It delves deeper into Snape's life after the events of the original series. It shows his struggle to come to terms with his past and his role in the wizarding world. Another good one is 'Snape's Redemption'. This fanfic focuses on how Snape tries to make amends for his past actions towards Harry and the others. It gives a more in - depth look at his complex character.
One great 'Harry Potter and Severus Snape' fanfic is 'The Prince's Tale Continued'. It delves deeper into Snape's character after the events of the original series. It shows his complex relationship with Harry in a new light, exploring how they might interact now that Harry knows the truth about Snape.
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.
I'm not sure of a specific title, but there could be one where a Squib uses their knowledge of Muggle medicine to help heal injured wizards after the battle. Since wizards often have different medical needs compared to Muggles, this Squib's knowledge could be a unique asset in the post - WBWL world.
There are not many non - adult fanfics with such a plot. However, some fanfic platforms might have stories where Snape disciplines Harry in a more appropriate, non - inappropriate way. You could start by looking on well - known Harry Potter fanfic sites like Fanfiction.net or Archive of Our Own and search for stories tagged with 'Severus Snape', 'Harry Potter' and'strict discipline' or similar non - offensive tags.
One great 'Harry Potter Squib' fanfic is 'The Life of a Squib'. It really delves into the daily struggles and unique experiences of a Squib in the wizarding world. Another one could be 'Squib Amongst Wizards', which shows how a Squib can still have an important role despite lacking magic. And there's also 'A Squib's Tale' that focuses on the relationships a Squib forms with both magical and non - magical beings.
One common theme is love. Snape's love for Lily is often explored in great detail, like how it shaped his actions and decisions. Another is redemption. Many fanfics focus on Snape's journey to redeem himself for his past mistakes. For example, his association with the Death Eaters in his youth. And there's also the theme of sacrifice. His ultimate sacrifice for Harry and the wizarding world is a big part of many fanfics.