Just like the ZenFone Max Pro (M1) and Max (M2), the update for ZenFone Max Pro (M2) is also currently seeding only in India, and there's no word on when these smartphones would get the Android Pie goodness in other regions.
That said, the Android Pie update for ZenFone Max Pro (M2) is rolling out over-the-air and could take a week or two to reach all the units in the country. It carries version number 16.2017.1903.061 and comes with March security patch instead of the latest April patch.
Do not upgrade. The screen blinking issue will make the phone unusable. The worst part is ASUS support. Neither they confirm that they will resolve the issue nor they pass any message on what should they do. Careless at its best
Pie is undercooked... Lots of users in India reporting bugs and issues. Probably better to stick to Oreo for now and let Asus finish re-baking the pie.
I want pie update