Yes, there are. Some popular ones might focus on reimagining the relationship between Scar and Simba. For example, there could be stories where Scar survives and has to learn to co - exist with Simba in a new Pride Lands. Another type could be stories that explore their past, like what really happened between them before Scar's betrayal.
In fanfiction, Scar and Simba can represent complex characters for exploration. Scar, being the villain in the original story, might be given more backstory or a chance at redemption in fanfic. Simba, the hero, could be put in different scenarios that weren't in the movie. Writers might use them to explore themes like power, family, and self - discovery in new and creative ways.
The theme of unlikely alliances also pops up a lot. Given their history of enmity, the idea of Scar and Simba forming an alliance, whether it's to fight a common enemy or for the good of the Pride Lands, makes for a very interesting narrative in many fanfics.
There is a fanfic titled 'A Different Path' which delves into an alternate universe where Scar survives his fall. Simba, instead of killing him, decides to rehabilitate him. It shows their journey of mending their relationship.
One possible plot could be a time - travel scenario. Maybe Simba goes back in time and tries to prevent Scar from becoming evil, and the kiss is a moment of connection that starts this change. Another could be a plot where they are both under a curse that can only be broken by an act of true love, which they discover is the kiss between them.
One common theme could be power struggle. Since Scar and Simba have that conflict in the original story, it might be explored further in fanfiction. Another could be redemption in some cases, where Scar might have a chance to change his ways.
In a Simba and Scar kiss fanfiction, it might be a situation where Scar has a hidden side that only Simba discovers through this kiss. For example, Scar could have been influenced by some dark magic all along and the kiss breaks that spell. Or perhaps it's a moment of extreme desperation where they realize that they are the only ones who can understand each other's pain due to their family ties and the kiss is an expression of that shared understanding.
A third one could be 'Beyond Enmity'. In this, the author explores what would happen if Scar survived his fall. It's a really interesting take as it shows Scar and Simba trying to navigate their relationship in a post - battle scenario, with a lot of character growth for both.
You can start by looking on popular fanfic websites like Archive of Our Own (AO3). Just use the search terms 'Simba x Scar' and it will show you a list of relevant fanfics.
I'm not sure which specific "simba and scar lemon fanfiction" is good as it might be a very niche area. But you could try looking on some popular fanfiction websites like Archive of Our Own and search for it there. Maybe start with the ones that have high ratings or a lot of reviews.