gtk2-branding-openSUSE from GNOME:STABLE:41 project
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Add repository and install manually
For openSUSE Leap 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/GNOME:STABLE:41/openSUSE_Leap_15.4/GNOME:STABLE:41.repo zypper refresh zypper install gtk2-branding-openSUSE
For openSUSE Leap 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/GNOME:STABLE:41/openSUSE_Leap_15.3/GNOME:STABLE:41.repo zypper refresh zypper install gtk2-branding-openSUSE