Well, there's no definite information available on when the AOT manga will end. It depends on various factors like the story's development and the author's plans.
The ending of the AOT anime aligns with a particular part of the manga. However, there might be some differences in the presentation and emphasis of certain plot elements.
The AOT manga wraps up in a way that ties up most of the storylines. However, it leaves some room for interpretation and has led to different opinions among readers about the overall satisfaction of the ending.
It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
The AOT anime concludes around a particular part of the manga. Keep in mind that the manga has additional storylines and nuances that might not have made it to the animated version.
There could be various fanfictions. Maybe some that focus on alternative endings, like ones where certain characters survive who didn't in the original. For example, a fanfiction where Erwin survives and leads the Scouts in a different way.
It could mean that a person who is a fan of 'Attack on Titan' (AOT) is reading or watching fan - created fictional works related to AOT. Maybe they are interested in seeing different interpretations or storylines that fans have come up with.
One way is to check on popular fanfiction websites. Look for ones with high ratings and a lot of reviews. For example, Archive of Our Own (AO3) has a large collection of AOT fanfictions. You can search for the most popular ones there.