and the unlocking of bootloaders, the base Z300C model remained largely stagnant. Lack of Official ROMs: There are no official builds of major ROMs like
Finding device-specific builds
Stock recovery will reject custom ROMs. We need a custom recovery. Asus Zenpad 10 Z300c Custom Rom
There are scattered threads attempting to port Android 9 (Pie) or 10 (Q), but these are generally labeled as "Works in Progress" or "Alpha." They usually suffer from critical bugs like broken audio, non-functional cameras, or deep sleep battery drains. and the unlocking of bootloaders, the base Z300C