Xiaomi's code has now revealed the existence of four devices that will be powered by Qualcomm's next-gen flagship chipset, the Snapdragon 898. The phones include the Xiaomi 12 and Xiaomi 12 Ultra, while speculation leans towards the other two being the Redmi K50 Pro and Poco F4.
https://www.notebookcheck.net/Xiaomi-12-series-and-potential-Redmi-K50-Pro-and-Poco-F4-confirmed-for-the-Snapdragon-898-by-Mi-code.560393.0.html