Yes, they have rollbacks for one previous version.
But the whole point of rpm-ostree is that you can be bit-for-bit the same as the upstream OS. If you do rpm-ostree reset you will go back to the latest but untampered system of Fedora.
On OpenSUSE microOS (and the others, please invent a name), you either install and immediately snapshot the system. Then you can fall back to an untampered but very outdated system. Or you need to reinstall afaik, which makes it not better than traditional distros.