Attached few SS for better understanding.. all 3 widgets have exact same setting but thr transparency functionality is not same and all 3 are Samsung widgets.. #1 Digital wellbeing #2 Device care #3 Alarm widgets.Cover image 

In version 12 Notification panel icons comes as rectangular circle bt in this beta it is coming same like v11 ? will it be in a final release or Samsung will keep Circle icon only??

I have tried multiple lvl bt not transparent effect on it.

While expanding the notification panel or clearing individual notification is too laggy.. You can easily see it on 120hz screen..

Clock widget disappear everytime after changing theme or reapply any theme. Need to add it again and again..*Both Analog and Digital clock widgets.