List of where to find Parahumans fanfiction

https://wormstorysearch.com/
Wormstorysearch.com is an excellent source for finding the most recently updated stories, and you can filter between NSFW and Safe for work. You can filter things so that it only shows completed works, or ongoing works while omitting dead fics. Unfortunately, you cannot filter to select for certain characters or omit the characters you dislike.

https://forums.spacebattles.com/
one of the most likely places to find Worm/Wards fanfiction.

https://forums.sufficientvelocity.com/

The other sources of Worm/Wards Fanfiction:

https://archiveofourown.org/tags/Parahumans%20Series%20-%20Wildbow/works

https://www.fanfiction.net/book/Worm/

https://forum.questionablequesting.com/ (mostly NFSW stuff, read at your risk!)