GrapheneOS has no progress to make, it all depends on the developers of the OHealth application, HeyTap. After the watch is detected by the OHealth app, the app freezes on a black screen. The watch(OPW 3) is connected directly to the phone via Bluetooth. All permissions granted. The black screen indicates a deadlock in the security libraries (heytap) when it is not granted access to the hardware identifiers (serialno_prop). Info's from app logs.
The only small hope for us would be HeyTap to develop a version of OHealth/HeyTapHealth app without dependencies, to help Huawei/HarmonyOS users(to get rid of workarounds), and this would indirectly benefit GrapheneOS.