Fanfiction.net is also a good place to search. Although the interface might not be as modern as AO3, it still has a decent amount of 'arthur x fem merlin' fanfictions. You can sort the results by popularity, rating, or date updated to find the ones that might interest you the most.
Another option is Fanfiction.net. There are many stories there as well. Look for the Merlin fandom section and then specifically search for the slash genre related to Arthur and Merlin. However, the interface on AO3 is generally more user - friendly for this kind of search in my opinion.
Another option is to ask in Merlin - related forums. There are many fans who are really into fanfiction in those forums. They can give you some great suggestions on Fem Merlin x Arthur lemon fanfics. You can also discuss with them about the elements you like in such fanfics, which can help you narrow down your search.
The first place I would recommend is Archive of Our Own. It's known for its vast and diverse collection of fanfiction. You can find everything from short, sweet stories about Merlin and Arthur's relationship to long, complex epics. Additionally, some Merlin fan groups on Facebook might have members sharing their own fanfiction or links to good ones. However, you need to be careful with Facebook as not all groups are well - moderated. Another option is DeviantArt, where some artists also write fanfiction along with their art related to Merlin and Arthur.
Archive of Our Own (AO3) is a great place to start. It has a vast collection of 'arthur x merlin fanfiction' in various genres and styles. You can easily search for the ones that suit your taste.
Join Merlin - Arthur fanfiction communities or forums. People there often share their favorite stories. They can give you recommendations based on what you like, whether it's a story full of adventure, romance, or a mix of both. You might also ask for specific 'Merlin Arthur 17' related fanfictions in those groups.
The unique aspect is the complex triangle of relationships. Fem Merlin adds a different flavor to the traditional Arthurian tales. Her relationship with Arthur can be both romantic and a strong friendship. With Uther, it's often a relationship of power dynamics and unexpected respect that grows over time.
There's also 'Three Paths in Camelot'. In this fanfiction, fem Merlin has to navigate her feelings for both Arthur and Uther. The author does an excellent job of showing the different dynamics. Arthur is attracted to her strength and kindness, while Uther starts to see her as an important asset to Camelot. It's a really interesting read.
There's also 'Merlin's Secret Heart'. In this fanfiction, the female Merlin is a very strong character. The story delves deep into how her relationship with Arthur changes over time. It starts with a bit of mistrust but soon turns into a deep, unbreakable bond. The author does a wonderful job of portraying their emotions and the challenges they face in a magical world.
You can start by looking on popular fanfiction websites such as Archive of Our Own. Just type in 'Lewis x Arthur' in the search bar, and it will show you a list of relevant fanfictions. Another option is to check out some fanfiction communities on social media platforms. People often share their favorite stories or links to new ones there.
Fanfiction.net is another place. There are numerous stories on this site as well. However, the tagging system might be a bit different, so you may need to do a bit more digging. But it's definitely worth checking out for this type of fanfiction.