Photographers have been begging the big camera makers (Nikon/Canon) to add cryptographic signatures to photos from their cameras for years, but so far they've resisted doing so.
I’m not sure there’s enough benefits for spending processing time, effort and resources on cryptography on any of these fronts.
Now smartphone apps taking “secure” pictures have been there for a while, for use cases like crash site photo for insurance claims for instance. They do fill the niche I think.