The CPU is based on ARM and English company that designs CPUs, and the OS is a fork of Android which is American.

fwiw harmonyos hasnt used android/linux for a few years. they still support apks via an aosp container, though

no, they just use ARM instructions set, the core design such as CPU, GPU, NPU, etc is all their own, like Apple. OS is not fork of Android, there is no Android code in HarmonyOS. HarmonyOS uses Linux kernel but has its own user space systems.

Except now both Kirin X90 and HarmonyOS are their own thing. Just like Android itself is based off Linux, but is its own thing now too. What matters is that the chips and the OS are developed domestically in China without reliance on British or American companies.