One of these is Springtrap, whose first appearance in the series was in FNAF 3, which places this game sometime after it in a chronological playthrough. 8. Five Nights at Freddy’s: Help Wanted (2019) Available on: Android/IOS, Nintendo Switch, Oculus Quest, PSVR, PC, PlayStation 4, ...
It most definitely is not canon. BUT what Monolith did was to take the brilliant ideas of Tolkien and use that as the foundation to make what was despite it not being canon, in my personal opinion a really enjoyable set of games.