That line is critical because it means they will effectively be manufactured in China but some token amount of assembly will happen in the U.S. so that they appear to be seen to be manufacturing in the U.S. when in fact they are made in China in any meaningful non-political sense.
A lot of the components are not made in China though. The GPU is most definitely not, nor is the CPU. A lot of the low value chips are Chinese, the mainboard probably is, but on a value basis, the most expensive components are not.
Well, if you don't count that parts not coming from this China, comes from that China.
And yes, by far the semiconductor dependence on Taiwan is like another tip of the iceberg thing to the whole process.
Just as American big co extremely naive in thinking that they can replace Chinese labour and factories with Vietnam (whose total industrial output is like one district o Dongguan,) it is equivalently naive to think for mainlanders that they can run away from dependence on Taiwan when even Koreans and Japanese can't do it now (Samsung tapes out a lot of ICs at TSMC and UMC, despite having own fabs for cutting edge stuff)
