More padding/margin between action button and other items on panel XFCE4

[arcolinuxz]

Details

• Distribution (with version):
  ArcoLinux 19.11.3 / Arch Linux based
• Desktop environment (with version): Xfce 4.14
• Arc version/commit (don't put "latest"): 20190917-1
• GTK+ 3 version: gtk3 1:3.24.12-1
  • Murrine engine version: gtk-engine-murrine 0.98.2-3
  • gnome-themes-extras version:gnome-themes-extra 3.28-1
• Installation method (package or source): arch repository

you can add action buttons to the xfce4 panel. It does not have any padding or margin between the next item.
Can you add a margin on the left and right please?