Hi,
weave for openSUSE Kubic is now available in the devel:kubic devel project, if you want to test/use it already today.
You need to fetch the weave-k8s-yaml RPM from https://download.opensuse.org/repositories/devel:/kubic/openSUSE_Tumbleweed/...
and install it instead of flannel or cilium. It will be hopefully available as official package in openSUSE and on the Kubic media in the near future.
Thorsten