Xiaomi plans to launch an app with built‑in native HarmonyOS support.

Xiaomi Home is currently in testing, with its developers collaborating closely with the native HarmonyOS team to roll out early access. The adaptation delay seems to stem from the app’s complexity and feature differences, which have impacted the release schedule.
In the meantime, you can add Xiaomi Home to your wishlist on Huawei’s AppGallery.