One great fanfiction where Hermione and Remus are soulmates is 'The Unlikely Bond'. It delves deep into their relationship, showing how Hermione's intelligence and Remus's wisdom complement each other. They face many challenges together, from dealing with the wizarding world's prejudices to their own insecurities. The story beautifully portrays their journey of falling in love and realizing they are soulmates.
There's also 'Hermione and Remus: A Soulmate's Tale'. This fanfiction focuses on how their souls are intertwined. It shows the little moments between them that make their relationship special. For example, how they communicate without words during difficult times. It also explores how their relationship affects those around them, like Harry and Ron, who are initially skeptical but later come to accept and support their bond.
A popular fanfic is 'Soulmate's Path'. In this, Hermione and Remus start off as acquaintances but gradually discover their soulmate connection. The author does an amazing job of writing their interactions. Hermione helps Remus overcome his self - loathing due to his lycanthropy, and Remus in turn encourages Hermione to pursue her more radical ideas in the wizarding community. It's a heartwarming read.