They might not know the specific import status of them when they probably have thousands of orders out to all different countries stuck in transit/customs. Utah air should have an idea of when they will come in, and you can preorder through them.
According to Matt and Reolf(sp) latest video. Patriot slugs are shipping to UA and they are in the works of getting .25 cal slugs available for purchase as well. The delays on the USA stock is due to the pandemic and bottles necks on all products coming into the USA.