Yakuza was shown running on Xbox Series X.
Is this your first time you noticed embargos? It's about giving the outlets time to check out features, games and all that without being under pressure that the competition are putting out clickbait articles before you have written yours. That's pretty straightforward and they aren't hidding anything. There's nothing weird about it.
Embargos are imposed gag orders for journalists/reviewers, they're aware of what they can/can't say and when they'll be able to talk about it. This wasn't an embargo, which is exactly what I pointed out. They weren't under an "embargo". they literally tried to play games like Halo 5 and the console would straight up not allow them to. This wasn't an embargo since they acknowledged they attempted to play the games and stated they found it odd that MS prevented the console from even running games that people would naturally be curious about playing... like major XB1 exclusive Halo 5.