Realme has released October 2021 Security Patch for Realme X2 devices along with a few hotfix in the system where users faced restart issues when dragging a mini window, also this update comes with RMX1992EX_11_F.25 build.
Realme X2 was released on September 2019, with Android 10 Out-of-the-box.
Realme X2 is a mid-range smartphone that competes with Xiaomi's Redmi Note 8 Pro, which is one of the most powerful current-gen smartphones. The Realme X2 is powered by a Qualcomm Snapdragon 730G SoC with a dewdrop notch with a large, Super AMOLED display with the in-display fingerprint sensor.
Many users have already started getting this update, and only its a matter of time this update will come to all the Realme X2 Devices

Source>>Realme Community
Check out -->> Realme UI 3.0 with Android 12
| Android OS | Update | Release Date/Status | Estimated Months |
| Android 9 Pie | Out-of-the-box | September 2019 | Nil |
| Android 10 | First OS update | March 2020 | 6 months |
| Android 11 | Second/Last OS update | July 2021 | 10 months |
The Realme X2 has received two major OS updates with Android 10 and 11. Therefore, the chances of a third major OS update with Android 12 are unlikely.
Hence, the Realme X2 Android 11 Update was the last major OS update on this device.
However, it will continue to receive Security updates this year at least.
For more Realme Android updates please download our Android App – Available on the Play Store