If GSM Arena's page on the [OnePlus 12](https://www.gsmarena.com/oneplus_12-12725.php) is correct, it can *only* run ARM64 native code: the processor cores in its Snapdragon 8 Gen 3 SoC can't run in 32-bit mode. For more about this, see [here](https://android.stackexchange.com/questions/253596/is-android-becoming-a-64-bit-only-operating-system/).

If the app uses 32-bit native code, which seems to be the case from the `INSTALL_FAILED_NO_MATCHING_ABIS` error, then you are stuck: your 'phone can't run that code. Rooting would not help at all, your hardware can't do it. 

It isn't impossible, in principle, for someone to write an emulator to run 32-bit Android native libraries on 64-bit Android, but I don't know of it being done, and it would be complicated. 

Some Xiaomi devices come with the "[Tango](https://www.androidauthority.com/xiaomi-14-series-32-bit-app-support-3380733/)" binary translator which allows them to run 32-bit native code, but that has to be integrated into Android when the OS is built. 

The easiest solution would be to acquire a 'phone that can run 32-bit native code. Those are still around, but they won't be forever.