No way in hell? My understanding is that an NPU could perform that type of processing locally. I welcome info & correction!
(I know other types of local ai processors could too, but there’s little chance Acrobat would be geared to look for them - even GPUs - unlike NPUs.)
Now if we switch to talking about policy instead of capability, I don’t think Adobe would miss a chance to be evil. So yeah they’re probably stealing all the data they possibly can.