The update is exclusive to Indian users only. The update is rolling out via OTA (Over the Air) to the Realme XT. So, it may some days to reach your smartphone. Alternatively, check the update status manually by heading to Settings -> Software update. This is a major bug fix update which addresses various bugs which were being reported after the previous update. It also promises to improve system stability and performance. There are some new features added which you can check in the changelog below.
Changelog
Security
Updated Android security patch: December, 2020, January, 2021
Settings
Added short-press the power button to turn off flashlight feature while screen-off
Apps
Fixed the issue that two cancel buttons appear when the input box is clicked multiple times in the weather
Bluetooth
Fixed the probabilistic issue of failure to open Bluetooth scanning
Photos
Fixed the probabilistic issue that Photos cannot play HDR videos
Alarm
Fixed the probabilistic issue of crashing when entering the alarm details
Networks
Fixed the probabilistic issue that VOLTE be registered
Via
