After upgrading to Big Sur, calendar notifications on Mac OS have become harder to dismiss. The notification appears in the upper-right of the screen, and to dismiss it, one must hover over the upper-left of the notification to cause an 'x' to appear, and then click on the 'x'. Subjectively, I find it tedious to dismiss the notification: the zone where I have to click seems small and requires fairly precise work with my mouse.
Is there a faster way to dismiss the notification? Perhaps a keyboard shortcut or some other trick?