The update is exclusive to China only. The update is rolling out via OTA (Over the Air) to the Realme X and Realme XT. So, it may some days to reach your smartphone. Alternatively, check the update status manually by heading to Settings -> Software update. The update mainly focuses on the VoLTE network related issues. It fixes the probabilistic issue of Volte failing to register issue. Along with all the fixes, the update brings some optimization to the sytem. There are some new features added which you can check in the changelog below
Changelog
Network Fixed the probabilistic issue of Volte failing to register
Via
