Mi A2 is the second Xiaomi in Android One. The device was released with Android 8.1 Oreo with its owners waiting to upgrade to Android 9 Pie. It seems that the pie update approaches as the first beta leaked on the internet. The ROM is complete with all features, but because it is a beta, there may be problems and software failures. You can try it after downloading this.
Be careful as always with the flakes – if you do not have the experience, do not proceed because there is a risk of blowing your phone.