The brand POCO has certified a new device with the Federal Communications Commission (FCC) and a number of other regulators. There is some evidence that this phone will be revealed as the Pro version of the X3 on its launch. To date, most of its specs remain a mystery, however, although its leaks point to NFC support, at least.
https://www.notebookcheck.net/A-supposed-POCO-X3-Pro-is-cleared-by-the-FCC-for-launch.517849.0.html