Pelosi has a long history of antagonizing China
Searching for some kind of conspiracy about why she's in Taiwan is so typical of these forums. Rather than noticing the obvious (her disdain for the CCP), you waste time searching for anything that will allow you to further demonize her. Not that I particularly like her, but your motives are clear as day.
As for the disconnect between Pelosi and the White House, this kind of approach has been standard procedure for decades when it comes to Taiwan. Take some action that undermines China, while publicly stating support for the status quo. How is this not understood by now?