Xiaomi has just certified a new mobile device with the Chinese 3C authority. The most obvious explanation is that it is of the K30 series - however, a report alleges that it has already been registered under a different model number. Furthermore, this identifier is linked to this line's confirmed 5G status, whereas the strange new one is not.
https://www.notebookcheck.net/A-mysterious-new-Xiaomi-certification-raises-new-hopes-for-a-Pocophone-F2.442853.0.html