The HxH manga's ending is controversial among fans. It doesn't offer clear-cut resolutions for all storylines and leaves room for interpretation. Some feel it was rushed, while others appreciate the mystery it leaves behind.
As of now, there are a specific number of volumes, but it's subject to change depending on the author and publisher. You might want to check the latest information on reliable manga websites or from official sources.
It's hard to determine exactly how far ahead the HxH manga is. The release of new chapters can be inconsistent, and there's no fixed pattern. Sometimes there are long breaks between updates.
One way is to check out fanfiction platforms like Archive of Our Own (AO3). It has a large collection of HxH fanfics and a tagging system that allows you to filter by things like genre, rating, and length. So if you're interested in a specific type of story, like a romantic HxH fanfic, you can easily find it there.
Well, 'hxh watch the future fanfiction' could potentially be centered around the idea of the Hunter x Hunter characters having the ability to watch events in the future. This could lead to them trying to change the course of things they see, or perhaps they are just spectators. It could also introduce new and strange elements that are not in the original series, like new types of Nen abilities that are related to future - seeing.