With firewalld moving to libnftables JSON
see: https://firewalld.org/2019/09/libnftables-JSON

The package nftables should be build with --with-python and --with-json.
This way opensuse/suse could support the newer versions of firewalld right
out of the box.

Answer from Upstream:

With this change firewalld has new dependencies; libnftables, and
python-nftables. Currently both libnftables and python-nftables are shipped
with the standard nftables package. Distribution packagers shouldn���t have to
change much. It really amounts to calling the nftables configure script with
--with-python --with-json.

libnftables has been around for awhile, but due to bug fixes and other changes
the firewalld developers are claiming the libnftables backend only works with
nftables >= 0.9.3.