The good news is that the first build of Android 10 based AOSP custom ROM is now available for Asus ZenFone Max Pro M1. The ROM is almost stable with most things working (RIL, Sensors, Fingerprint, Wi-Fi, camera, etc.). If you are excited to experience the new OS on your ZenFone Max Pro M1, then here is how to get it now. Note that a special TWRP recovery needs to install on your Asus ZenFone Max Pro M1 before installing this AOSP custom ROM. TWRP for Android Pie won’t work. Also, special Gapps (Android 10 compatible Google apps) are required to get Google features.

Download:

You can download latest version of Android 10 AOSP custom ROM from the development page here. Android 10 compatible TWRP and Gaaps zip files download from this XDA page.

Installation

Download the latest build, GApps and system-as-root twrp from above link.Reboot the phone into recovery, flash system-as-root twrp from install optionReboot the phone into recovery again from reboot option menu.Wipe system, vendor, data, and cache from Wipe option.Flash the latest build using Install option menu.System will be mounted already. Untick it & Remount system and vendor manuallyNow, flash Gapps zip file using the Install option.Finally, reboot the phone using Reboot option.

As always, backup any important file stored on your device before flashing this ROM. Also, do not forget to make a system backup from TWRP recovery. Follow the above instruction at your own risk. We will not be liable if any damage occurs to your device or its components by installing this ROM. It is recommended for technically talented users only. (Source – XDA)