Seeing a dotted square white border (Universal Focus Rectangle) around desktop icons is not a big thing. But if this occurs often & annoys you, see this post.

[Learn more about macOS Monterey here.]. How to turn on Focus manually. In the menu bar, click the Control Center icon. It’s a pair of black and white switches.

Starting today, you may notice your Slack mobile app icon change from purple to white. This should make it a little easier to see on your device. Visit the Google Play or Apple App Store to update. — ...

You’ll see the Focus button with an icon next to it. By default, it’ll be the moon icon. When tapped, it’ll activate your primary Do Not Disturb profile.