I would like to know, at this point, if the U.S. Coast Guard has been asked / requested or OBLIGATED to actually direct proceedings to recover all the debris of the sub Titan.
I suspect they ARE obligated to do that, and are in the process of doing it, but they just do not want to do that in the glare of global media or even talk about it at all. Because inevitably someone will ask ...."what about the bodies of the deceased?" and the truth is there ARE no bodies remaining, there's nothing left you could even do an autopsy on and that's the nature of what happened to the crew at these incredible depths.
Doubt there's even anything more than fragments of bone. Beyond horrible.
But I believe that the debris of the SUB will be recovered as it will be required to have an investigation of the material that remains of the doomed ship 'Titan' for legal / lawsuit purposes, and also for future laws regarding the certification and sign-off of ultra-deep-dive vehicles of this nature.