There are no plans to specifically support HarmonyOS. A lot of the code will like "just work" similar to Android and iOS, but the whole OS API integration surrounding windowing, events, etc. would still need to be implemented.
I don't know anyone of the existing and active maintainer team who would have the necessary time to invest into this, nor do I know anyone with a HarmonyOS device.
There's a good chance that if someone were to spend the time to contribute and test these changes, that it would be accepted.
