It will be based on Android 12 and Android 13 (depending on model)
Xiaomi is working tirelessly on MIUI 14 for those models that have not yet received the latest version of the Chinese company’s interface. These include, for example, the global versions of Redmi Note 11 Pro 5G (aka Redmi Note 11E Pro), Poco M5s, Redmi Note 11, Redmi Note 11 NFC, Redmi Note 11S 5G, Redmi Note 11S and Redmi 10. All of them, according to According to the Xiaomi UI resource (it constantly monitors the release of new firmware versions for Xiaomi smartphones), they will receive MIUI 14 very soon.
The firmware will be released for four more Redmi and Poco models
This is not about the next beta version, but about the final one. For some (older) models, it will be based on Android 12, and for newer models, it will be based on Android 13. As noted, Xiaomi delayed the release of MIUI 14 for all these models because there were many bugs in previous versions. Now, probably, all errors and shortcomings are eliminated and everything is ready for release.