People on Reddit are saying the battery life on 18.1 is hit or miss. For me, right after I upgraded I noticed that the icons for all my Control Center shortcuts are busted and the hearing accessibility button keeps reappearing even after I remove it.
I regret trying the beta at this time.
They either changed how the notification works or made it minimal for models with the Dynamic Island. I just tested a simple shortcut to open an app and besides a little blip on the Island it was no different from opening the app normally.