I was able to get my widgets back on Ventura Beta 7 (22A5342F) by using the following terminal commands... defaults delete com.apple.notificationcenterui; killall NotificationCenter (restart computer) open -a NotificationCenter

I was able to get the widgets back using the following terminal commands...      defaults delete com.apple.notificationcenterui; killall NotificationCenter (restarted Mac)      open -a NotificationCenter