there NSSupportsLiveActivitiesFrequentUpdates key in document, Sometimes we need the dynamic island to refresh the time and app information, which requires a refresh frequency of about 0.1s, since this key is provided, it should allow a frequently update I have submitted the API enhancement feedback and hope to get a reply. Another very important point is that the current iOS17 can be frequently update, if iOS18 adjusted the system limit without any document, it will affect many apps

there NSSupportsLiveActivitiesFrequentUpdates key in document, Sometimes we need the dynamic island to refresh the time and app information, which requires a refresh frequency of about 0.1s, since this key is provided, it should allow a frequently update

Besides this, you can also download the Reality Composer app on your iPhone or iPad. Then, share the .rcproject file to your phone or pad for editing. Once the editing is done, import it back into Xcode. I'm not sure why Apple doesn't provide a Mac version of Reality Composer.

thanks to FelixII answer. There is a temporary solution: If watch app send local notification , I'll send the notification 13 seconds ahead of time. This way the notification appears to be on time Hope to have a better solution in the future