I'm assuming Disney has stocks because they have deeper pockets and ordered bourbon even when they weren't sailing. Or they're able to divert product for export to their theme parks.
I just looked and for the first time in months our local Virginia ABC store shows good stocks of Woodford Reserve. It's been hit and miss for months.
After the last big "where's the bourbon" discussion on the board, I did a little extra searching and the cruise lines are able to bypass the three-tier distribution model. They order direct from the maker (probably Brown-Forman for Woodford) and the product is delivered "for export", so they apparently don't have to go through a Florida distributor. That was a bit of a surprise, and I don't remember where I found the information, but it makes sense. Whether someone like Disney is able to float their order between domestic (using a distributor) and export (distributor not required) is an interesting question.
I have to assume most cruise lines dramatically reduced their orders while shut down and they're now competing with outlets who maintained demand. And for the rarer Buffalo Trace products like all the Van Winkles, you just keep buying because if you ever stop, you'll never get in line again.