Comment by zb3

HarmonyOS kernel (HongMeng) is not only closed source but also encrypted. Those devices do not allow you to unlock the bootloader or install apps not signed by them (albeit I don't know how that works for emulator apps, a signed Android emulator could possibly allow arbitrary apks).

Huawei made a big mistake by not fully open sourcing HarmonyOS, you can't flash OpenHarmony so it doesn't count.