They have no information on the location. Honestly the moment they lost comms and could not restore them I find it extremely unlikely someone in charge did not already know this submersible was a lost cause.
Given in a power loss it is supposed to automatically surface I would assume it has a means to broadcast its surfaced location in such an emergency.
That leaves only the likely result of it continuing to sink after the loss of comms.
Watch the video. I wouldn't assume they had any sort of backup systems/redundancy, contingency plans, or anything else. The whole operation and the submersible are almost comically inadequate in every way.
If it automatically surfaced and they lost comm, they are as gone as if it imploded 13k feet down....and submersible may not be found for years - on the surface.
Clearly not enough redundancy back-up systems in many areas......
I suspect they are goners - if not now, soon..........