Android 13 is the thirteenth version of the android operating system that is expected to be released officially by August 2022, the google pixel’s smartphones will get this version first. So that means this version of the operating system is not yet published.
Following the valid source information, the Xiaomi smartphone will be released after 2021 and will get the update to Android 13. But the possibility of Poco C31 is much less cause; meanwhile, it has the Android 12 update. So far, it can’t be said clearly if Poco C31 will get the Android 13 Update or not.