yast2-squid from YaST:SLE-15:SP2 project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 15.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-15:SP2/openSUSE_Leap_15.2/YaST:SLE-15:SP2.repo zypper refresh zypper install yast2-squid