Yeah, that's possible. It's just like cloning in soil. Just curious, did you get impatient trying to root in in rockwool and just decided to plant it? Lately I've just been cloning all of my clones straight into soil.
It should be fine, but if they were under a humidity dome before, and now that you've planted them they'll be in the open, I'd just watch for signs of drooping etc, and if you see that, then get them back under the dome for a bit until they've perked back up.