xfce4-docklike-plugin from X11:xfce:4.19 project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce:4.19/openSUSE_Tumbleweed/X11:xfce:4.19.repo zypper refresh zypper install xfce4-docklike-plugin