Theoretically yes. Although what would actually happen who knows. It's a step nobody has really tested
But in theory
- Every Android phone stops doing Google services, and any US managed one gets turned into a brick
- Every iphone is a brick
- Every windows PC ransomwares itself
- Every home appliance with a US connection is destroyed or worse
- Every US controlled home battery and solar device stops working
and so on. This is why in reverse the US is scared of China