AFAIK the Superheavy booster can't land on it's own and was never designed to. It needs (currently) the launch gantry to catch it in all the preview footage.
It's always struck me as a very risky gamble on SpaceX's part to do that because you're risking your whole launch infrastructure if something goes wrong in those last seconds.
Yeah, it's mindblowing and seems reckless. Then again, they seem incredibly competent at everything they've done so far. It will certainly be a spectacle when/if they can pull it off!
I think technically it's just barely large enough to fit, but, the booster isn't designed to land like that, it's supposed to be caught from the top by a tower. So, the Raptors would probably burn a hole through the barge trying to land on it.
The eventual plan was to catch these with towers on modified oil rigs, then refuel and relaunch from there. But that has been put aside for now, there's so much land infrastructure to focus on.
