Davey Jones claimed them long time ago.
I understand the grave perspective. I guess at some point our graves become archeology sites.
I am not sure what taking a telegraph kit out of the ship would teach anyone. Hopefully, progress has been made in ship to ship communications in the last 110 years. And discovering what “happened” that night is really not a pressing concern to many people.
I imagine anything that was worth “liberating” from the site was liberated a long time ago.