I don't see how this would stop if the US somehow gets a global min tax rate. The power to do something is in the US hands and doesn't require any foreign count

I don't see how this would stop if the US somehow gets a global min tax rate. The power to do something is in the US hands and doesn't require any foreign countries to change anything. These companies want to operate in the US. Just force them to pay what ever rate you find right irregardless what some islands tax rate might be. Huawei is blocked from operating in the US. Not because of taxes but they would pay whatever if they could get access to the market.