Here I tell you why angel fazhuman appears in TDNaAAT, if both games take place in different years, well here I explain

FNAA Occurs in 1996

after the FNAA CH 1 and 2, several years later, angel's Entertainment World, decided to open the restaurant but better, as many years passed and was still remembered the place, in 2020 in a factory of angel's Entertainment World builds the animatronics faithful to their old designs, Angel, Freddy and Walten was ready, just missing Jake and a possible new animatronics (here occurs Angel's Oxygen Room), in 2022 would open the new angel's Entertainment World.

But in 2023 comes the November Earthquake, and the restaurant was destroyed.

https://gamejolt.com/p/fnaa-ch-2-is-back-lore-update-go-follow-the-page-https-gamej-65yggeh9

I have Permission from @MrAngelGames584 for this

As FNAA is now Canon on TDNaAAT, I recommend you to play the FNAA Saga, if you want to know more about the history of Angel Fazhuman.https://gamejolt.com/playlist/the-five-nights-at-angel-s-saga/357400