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Video of cloud platforms moving: https://twitter.com/zedd_usj_0118/status/1225680501882515456
It says the opening is scheduled for July 24th before the Olympics begins which doesn't make since the Olympic IS starting on July 24. It's just bad writing and the opening day of the area hasn't been announced yet.
I can read Japanese, and it's not a miscommunication. The article specifically states that the world opens the same time the Olympics start, so that opening date may actually be the right date. Considering there was some marketing material on how the date was sometimes listed as "Summer 2020 Olympics" I do feel that this article knows what it's saying.