Well of course it does, would be a very pointless surveillance system if it scanned for stuff and then threw away the result.
I've also read the technical papers and all other info put out by Apple so far and my takeaway is that the system is generic, it's not designed specifically for images but can be used with any old fingerprint and arbitrary data can be uploaded in the "security vouchers".
It does not take much imagination to see how it could be used to mass-surveil E2EE communications, hook it into Siri's intent system, add a bunch of banned intents and throw the message into the voucher. If a threshold of bad intents is reached a reviewer will check your messages to verify that you actually had some bad intent before dispatching a patrol to your location.