1👍
As described on this issue, although the issue is related to vite-plugin instead of quasar webpack app and Notify being used in another context, it appears to be some issue when three shaking the import list.
If imported using the actual path of the plugin, it works fine.
import Notify from 'quasar/src/plugins/Notify'
It will loose TypesScript reference though.
Source:stackexchange.com