They work. Just that some launchers haven't built support for Android 14, never mind Android 14 QPR2. The options are quite limited but make sure to check if they work on Android 14 first.
Discussion
I'm not that comfortable with a third party launcher, not even sure if there are FOSS options, and as you say, they're likely not as well maintained as Graphene directly.
Thus an in-house launcher customizer would be much appreciated.
Many thanks. There is no life beyond Nova launcher :)