The Realme GT Neo 2 doesn’t have Android 12. The Google Android 12 was officially released on 4 October 2021. And the Realme GT Neo 2 was released on 13 October 2021. So there was no possible chance to develop the phone with the under-constructing Android 12 operating system.
The Realme GT Neo 2 has Android 11 as its operating system and Realme UI 2.0 as its user interface. The Realme GT Neo 2 was officially released on 13 October 2021 with Android 11. The Realme GT Neo 2 holds the best feature of Android 11 that no Android 12 phone may have while launching in the October of 2021.