Taiwanese presidents, including Tsai, have a record of travelling through the U.S. en route to other countries, usually for a day or two, though the U.S. government has generally avoided meeting senior Taiwanese officials in Washington.
2023 March 7, Ben Blanchard, Yimou Lee, “China 'seriously concerned' by Taiwan president 'transit' plans amid reported US trip”, in Muralikumar Anantharaman, Robert Birsel, editors, Reuters, archived from the original on 08 March 2023, Asia Pacific