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.
Some Tumblr blogs are dedicated to sharing and recommending 'arthur x merlin fanfic'. You can search for relevant tags like #arthurxmerlinfanfic or #merlinfanfic and you might find some great suggestions from the community.
One common theme is the exploration of their relationship in a different context due to Merlin being female. It often involves a different dynamic in their friendship and potential romantic relationship.
You can try fanfiction.net. It has a large collection of fanfictions including those related to Fem Merlin and Morgana. Just use their search function and type in 'Fem Merlin x Morgana' and you'll get a list of relevant stories.
I really like 'The Female Merlin's Quest'. In this fanfic, the author does an excellent job of showing how a female Merlin would interact with Arthur in Camelot. It has a great plot that involves magic, politics, and of course, their growing affection for each other. There are some really touching moments that make it a great read.
Another place to look could be FanFiction.net. There are often fanfics about different character pairings. However, the quality can vary, so you might need to sift through a bit. Look for tags related to the characters and also check the ratings and reviews to find a good 'Fem Claude x Sebastian' fanfic.
You can try fanfiction platforms like Archive of Our Own (AO3). It has a vast collection of fanfictions in various categories, including Omega Merlin x Alpha Arthur ones. Just use the search function and type in relevant keywords.
You can try searching on fanfic platforms like Archive of Our Own. There are often a wide variety of Merlin - related fanfics, including those involving Mithian. Just use the search bar and type in relevant keywords to narrow down your search.
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.
One popular 'arthur x merlin lemon fanfic' is 'The Bonds of Camelot'. It beautifully weaves the relationship between Arthur and Merlin, with detailed character development and a plot that keeps you hooked. The lemon aspect is tastefully done, adding an extra layer of intimacy to their relationship without being overly vulgar.
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.