The Asus Zenfone Max Pro M2 will get Android 9.0 later this year, but those adventurous enough can already join the beta upgrade program. However, the beta testing comes with a catch: Asus will not provide downgrades and cannot be held liable for any potential damage or data loss that may occur during this stage.
https://www.notebookcheck.net/Android-9-0-Pie-beta-rolls-out-for-the-Asus-Zenfone-Max-Pro-M2.403116.0.html