They are not banned. Some were initially but as far as I am aware they are complaint now. Pretty sure you cannot complete your order if it cannot be shipped to that State due to regulations. 
So like my last post, I bought the Alienware Aurora R10 from the slick deals link, it has the ryzen 7 5800(no x), Radeon 6800XT, 1000 watt PSU, liquid cooled, 1 stick of 3466 mhz 16 gig ram, 1 TB ssd and 1 Tb hdd. However, I caught up on some old news that the r10 and r12 models are banned in California(where I reside). Will this affect me?
Aurora R10, available to ship into CA?