NetworkManager from home:yfjiang:gnome41update project
Select Your Operating System
Add repository and install manually
For SLE 15 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:yfjiang:gnome41update/SLE_15_SP4/home:yfjiang:gnome41update.repo zypper refresh zypper install NetworkManager