nextcloud from home:Simmphonie:nextcloud:28 project
Select Your Operating System
Add repository and install manually
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Simmphonie:nextcloud:28/15.5/home:Simmphonie:nextcloud:28.repo zypper refresh zypper install nextcloud