I mostly see Glamrock Freddy and Bonnie stuff on Archive of Our Own, honestly. That tag system lets you sort through all the different AUs people come up with—you get everything from sweet coffee shop romances set in the Pizzaplex food court to full-on horror rewrites where Bonnie's disappearance gets explored. The quality really varies, but the good ones are fantastic. Tumblr’s where the moodboards and headcanon posts live, which is great for getting vibes and inspiration, but the longer-form stories tend to migrate to AO3 anyway. I’d skip Wattpad for this ship; the algorithm buries a lot of the decent FNAF stuff under mountains of other fandoms, and the tagging is a mess. If you’re looking for something specific, like a ‘what if Bonnie never got decommissioned’ fix-it, AO3’s filters are unbeatable.
Some folks cross-post to Fanfiction.net, but that site feels pretty dated for a newer ship like this. The comment culture is different, too—less discussion, more ‘update please’ kinds of messages. For me, the heart of the ship is on AO3, where authors really dig into the pre-canon dynamic and the whole tragedy of Bonnie being gone. The best ones make you feel Freddy’s grief and the quiet moments they might have had backstage.