Option for showing stickers on the desktop is one of the hidden features in Windows 11 22H2. To enable the feature you need directly modify the Windows registry.

To Enable Option for Showing Stickers on the Desktop Through Windows Registry

Warning: Modifying the Windows Registry directly through Registry Editor (Regedit) may cause problem to Windows. Proceed with caution. Before making any registry changes, make sure that you already familiar with the basics of the Windows Registry.

• Press the "Start" key on the taskbar.
• Search and open "Registry Editor".
• Go to the following folder: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\current\device\Stickers
• Using the right-click menu, create a new key with the follow name "Stickers".

• Using the right-click menu, create a DWORD value with the follow name "EnableStickers".
• Set the value to 1 to show the "Choose stickers for your wallpaper" option in Windows settings or 0 to hide
• Sign-out or Restart Windows for the changes to take effect.

Once enabled, go to Settings > Personalization > Background and click the "Personalize your background" button. You can find option to "Choose stickers for your wallpaper" at the bottom.

Click the "Add stickers" button and a dialog for selecting sticker will be showing-up. You can also add or edit the stickers from the Desktop context menu.