From the p.o.v of the seller of mining hardware, he's just selling hardware in exchange for money, and he has no KYC/AML requirement, he's not a bank, he's just a regular business.
And any other company involved in building the mining operation are the same way.
Right but the point of laundering is that you have cash you want to legitimize, so it must "re-enter" as cash. But hardware mining sales are all online, not cash, hence my original comment!