ipv6nat on docker-daemons running in rootless mode?

is it possible or is it usefull to use docker-ipv6nat on a docker-daemon which is running in rootless mode?
due the documentation (https://docs.docker.com/engine/security/rootless/) 
the host network (docker run --net=host) is also namespaced inside RootlessKit
which means the container sill has no real host address, right?

could someone take a closer look at this?