Again, Intel is a fierce competitor to TSMC, yet they are also TSMC’s customer. AMD will be the same to Intel if they can’t secure enough volume from TSMC.
TSMC’s revenue is like 70 times of Intel’s foundry business. Intel only plans to leapfrog Samsung by the end of this decade. What Intel aim to lead is the process. They plan to introduce 18A by the end of this year, followed by 14A.
China will not be cut off from the global market, only at the very high end. Nvidia just recently showcase their latest chips to Chinese market. They will continue to be a main driving force along with the US.