Для openSUSE Leap 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/filesystems:bcachefs:release/openSUSE_Leap_15.6/filesystems:bcachefs:release.repo
zypper refresh
zypper install dkms
Для openSUSE Leap 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/filesystems:bcachefs:release/openSUSE_Leap_15.5/filesystems:bcachefs:release.repo
zypper refresh
zypper install dkms
Для openSUSE Leap 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/filesystems:bcachefs:release/openSUSE_Leap_15.4/filesystems:bcachefs:release.repo
zypper refresh
zypper install dkms