Recently, an upcoming OPPO device with a pleasant dark blue finish and quad rear cameras appeared on the Chinese regulator TENAA's website. Subsequent leaks indicate that it is the K7x 5G, a 90Hz display device slated to launch on November 4, 2020 in the same country. It is set to run on the Dimensity 720 SoC, up to 8GB of RAM and a 5000mAh battery.
https://www.notebookcheck.net/OPPO-is-slated-to-launch-the-K7x-a-new-phone-with-affordable-5G-specs-in-November-2020.501404.0.html