How to switch between windows in Safari 15.5?

Hello sonny9,

The shortcut to switch to another Safari window would be Command-` (above the Tab key).

This information is available from: Keyboard shortcuts and gestures in Safari on Mac - Apple Support

Have a good day.

sonny9,

If you're unable to verify the correct shortcut by looking within Safari's menus in the menu bar, or by checking the Keyboard Viewer to see your layout, your next step will be to Contact Apple Support for help.

Have a great day!

Hey there sonny9, 

Taking a look at Keyboard shortcuts and gestures in Safari on Mac,

"Keyboard shortcuts in apps may vary depending on the language and keyboard layout you’re using on your Mac. If the shortcuts below don’t work as you expect, look in the app menus in the menu bar to see the correct shortcuts. You can also use the Keyboard Viewer to see your current keyboard layout, known as an input source."

Have a good one!