Safari will now auto-update tab groups across all your devices, too, and so Safari on iOS 15 and iPadOS 15 is also getting updated with a new look and support for tab groups. Safari: Apple is launching a redesign of Safari alongside macOS Monterey that will see the browser's tabs get smaller and organizable into “tab groups”, a la Google Chrome.
Safari is getting an upgrade and support for creating tab groups, something Google Chrome already supports.