This is the usual Trump propaganda and "diplomacy" tactic. Build up to some explosive action that shocks the world, announce a complete and total achievement of their war goals prematurely and capitulation from the opposition, then continue negotiating the details quietly with the very much not defeated opposition for more limited war goals.

It serves as a way to disarm domestic opposition, as people will believe "it's already over" and so that there's nothing to be done and magnify and normalize the actions abroad with their media monopoly. Then the opponent has to catch up to them with their smaller media presence in the world stage and language barrier.

This has been a trend this whole presidency, the conflicts with Sheinbaum and Petro early on, tariffs on Brazil among others. People often act as though Trump is crazy and unpredictable, but he's actually pretty repetitive in his methods.