After seeding the first MIUI 13 update to the Poco F3, Poco is now gracing the Poco X3 Pro with its own taste of MIUI 13. While the Poco F3's update was for Mi Pilots, the Poco X3 Pro's appears to be a stable build.
https://www.notebookcheck.net/The-Poco-X3-Pro-receives-Android-12-and-stable-MIUI-13-update-globally.605797.0.html