According to Wikipedia the first EAFR was recovered on June 13th and the second on June 16th (nine days ago).
News articles tend to discuss “the” black box, so reporting about each’s status is muddy.
The EAFR used on the 787 is a newer and better technology than older aircraft, but that also means the ability to interface with the box is less ubiquitous than for, say, a 777 or A350. Standalone benchtop readout is a little more complicated than when the units are installed and the aircraft computers can assist with data retrieval. Certainly that is a capability several large accident investigation orgs have (including the NTSB, BEA, etc.) and larger airlines have, but it might be an additional wrinkle for most others.
I say “different technology,” but fundamentally the unit is still solid-state memory in a rugged, heat-resistant container like all other recorders. It can be an incrementally larger challenge when the accompanying interface electronics in the un-protected part of the LRU are destroyed and the survivable memory has to be “franken-grafted” onto new a new interface. I have seen a few reports that at least one of the recorders may have been in that condition, but again, reports are muddy.
AFAIK, the boxes are still with the AAIB. A Sky News story from today says, “The government said in a statement that the AAIB would decide where the recorders would be examined after making a "due assessment" of all technical, safety and security considerations.”
That could mean either an army or technicians is working furiously on the difficult task of restoring the ability to readout data from a fragile unit, or it could mean the AAIB is held-up by government procurement processes to purchase the needed hardware and software to perform readout locally, or they are considering negotiating which sister agency would be best to include in the investigation.
Having the units for two weeks with no progress to report starts to become awkward in many scenarios, IMO. But I’m not involved and it is more important to be cautious and avoid inadvertent destruction of evidence than having a fast timeline; the bits on the memory won’t disappear anytime soon.