I've bought a couple of bottles online, but only pricier stuff that you also can't find or is very hard to find in the idiotic state controlled liquor stores here.
Rum selection in most stores here is pretty abysmal.
I don't even know how that could be realistically controlled or enforced. Best case it would be controlled by the (online) store you are purchasing from.
The store would have to know the exactly list that Ohio stores 'can' get, and make sure they don't send you those, but can send you anything else. The store is not in Ohio, so what in the hell is Ohio going to do? And, how would they even know to enforce against the purchaser or seller?
I trust what you are saying is true, it just seems dumb and pointless.
Probably it has some teeth for commercial purpose e.g. a restaurant or bar.
I bought a bottle of Pyrat Cask 1623 online a few years ago. I saw one at Weilands maybe six months after that, so I'm guessing it was 'available' in Ohio... but not actually since that's the only bottle I've ever seen in a store in Ohio. ¯\_(ツ)_/¯