Realme has unveiled its first 5G phone today (January 7, 2020), as expected. However, the OEM did have more of a surprise to drop on the audience at the X50's launch: it is also the first phone to ship with Realme UI. This is a new software skin, although it is still based on ColorOS 7/Android 10.
https://www.notebookcheck.net/The-Realme-X50-launch-also-reveals-a-new-customized-skin-for-Android.449434.0.html