It is likely that the US will get a live feed from each AI provider that they are inspecting in real time to identity things of interest, terrorist attacks or foreign government planning or even foreign companies competitive to key US companies.
It will give them access to the though process in those companies as well as much of their text-based IP (source code, docs, meeting transcripts, etc)
Also if you are using local AI that you didn’t train yourself you can never be sure it doesn’t have purposeful biases in its reasoning that may disadvantage you - such as directing you away from certain plans or ideas or patents etc.