Facepalm. I noticed that too and ranted about it: https://neil.computer/notes/apple-ux-ui-is-regressing/
The only thing I’ve learned about dealing with these new notification types is that you can hover over them and swipe left to right to dismiss them. Unfortunately the notification will reappear sometimes. It seems like this happens for calendar notifications but not Messages notifications.
Anyone else have tips for how to deal with this? In ready to turn off notifications completely, which is unfortunate because I like to have calendar notifications (but only once).