Oppo generally provides two years of major OS updates for its mid-range A-series phones. Since the A9 2020 has already transitioned through two generations of Android, ColorOS 11 is the final official stop. Devices eligible for ColorOS 12 generally require a minimum of the Snapdragon 665's successor or higher RAM management capabilities to ensure a smooth experience with the new UI engine. Why ColorOS 12 is Not Supported
If you want the look and features of ColorOS 12 on your A9 2020, here are your safe options: oppo a9 2020 coloros 12 update
Have you successfully extended the life of your OPPO A9 2020 with a custom solution? Share your experience in the comments below (but remember, no unofficial update links). Oppo generally provides two years of major OS
You have three realistic paths forward: