Biden is playing classic "Good cop-Bad cop" routine with Pelosi-visit to Taiwan.
- On one hand, Biden is going to lift massive amounts of China Tariffs to fight inflation, opening himself to criticism of "weak on China" by opponents.
- On another hand, Biden is defacto sending Pelosi, so he can claim to be "tough on China".
- While on another hand, Biden is publicly saying the visit "not a good idea" because he has a phone call with Xi Jinping in less than 1 week to discuss relations.
So on the whole, Biden can do both (Lift Tariffs, Appear Tough via Pelosi-visit) to appear like he is "Tough Man", but in reality, he is doing "Good cop-Bad cop" routine via Pelosi-proxy for domestic audience purposes.
I don't think Biden is using any sort of strategy right now. It all seems rather ad hoc to me.
Pelosi isn't an independent person, she is a government official. She will only go if instructed to do so. Biden can't claim he's against her going then allow her to go.
I think the plan orchestrated by the White House was for Pelosi to visit Taiwan as another provocation. However the Pentagon advised them that it would be a bad idea, and possibly lead to war. This is advice the White House didn't expect, as the Pentagon are usually happy to enflame tensions.
After the Taiwan strait incident earlier in the month the US military realised that China is not messing around and will be quick to start a war if provoked. Given the US military currently have their hands full in the Ukraine at present, opening up a new front against China is not something they are keen on. I doubt Biden wants a war with China either, they just want to act "tough". The only question is how can they back down without looking weak. I'm sure that's what Trump will be accusing Biden of.
I don't think lifting tariffs on imports is a sign of good faith, it is an effort to curtail US inflation. I'm sure the CPC will see through that (and hopefully impose equivalent export tariffs). A gesture of good faith would be tighter control of their puppets (UK, Japan, Australia, etc), or the elimination of sanctions related to technology exports like EUV.