Yes of course, but anybody doing anything non-trivial is selling it to the government and not writing about it online. Using the spectrum or waterfall as the input to an RFML system is very common and in my experience works pretty well. A lot of systems also train on I/Q data. Usually these systems are designed to be trained on signals that are relevant to a specific mission. So a product might look like both a platform for annotating and training a model as well as deploying it, usually as a plug-in into a separate expensive SIGINT platform. The biggest products I'm aware of aren't even advertised and last I heard cost in the six figures.