>>380220052
Then it's just an avatar that is quest-compatible.

https://docs.vrchat.com/docs/avatar-fallback-system
>In other words, there's a few conditions that must be fulfilled in order for an avatar to work as a Fallback. Your fallback avatar must:

>Be built for all available platforms (currently Windows and Android)
>Be Good or better Performance Rank on the respective platform
>Have the Fallback flag set from the Android upload
Imagine a situation where you are playing on Quest. You see quest-compatible avatars, but you specified harsh performance settings, so some avatars are hidden. Then you'd see fallback avatars instead of the hidden quest avatars.