flatpak from home:ahjolinna:AtropOS 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/home:ahjolinna:AtropOS/openSUSE_Tumbleweed/home:ahjolinna:AtropOS.repo zypper refresh zypper install flatpak