Tsai is just going to New York and Los Angeles. She is not going to Washington DC. This implies that she is going to the US for a vacation, not on an official duty. Whoever she meets there, doesn't count as anything official. Because again, she is technically not there for official duty. Unless of course, she suddenly detours to DC from New York. Or she and US officials meet in an official capacity.
Looking at Tsai's trip itinerary, it looks like a PR stunt to say: "Oh Tsai is going to the US! She means business!". I think Tsai is chickening out of anymore direct provocations. Her political career can't afford anymore of it, after what the last one did to her. If Tsai's trip goes as planned, I think there shouldn't be any big fireworks from China. Just more of the usual diplomatic protests.
They are laying low until the 2024 elections. McCarty already said that he decided not to go there for now (read between the lines, Taiwan elections), but that he can go in the future and that China can't dictate to him what to do.
They want to secure another DPP term 100%. The population wouldn't quite like another PLA exercise like the previous one of august last year, 1 year before the election, and that might elect KMT if happened. And the US doesn't want that.
They have clear continuity of more people self-identified as Taiwanese and the potential for DPP to rule forever, they don't want to be rash, they want to cement that first. After cementing that in 2024, that's the time for them to act.
At that time, China could only intensify and prolong the previous operation during the Pelosi visit, since the first one didn't deter similar behavior from the US, and then the US will maybe directly intervene to "stop" the blockade or something.
With the intensity of the US provocations, it's obviously clear how much they want this war to happen sooner than later. I think if McCarty wouldn't be enough, they might even send a Vice President or summon the Taiwan president directly to the DC. Or that last option will be first.