Pinger still attached. That raises questions now about effectiveness of phase 1 & 2 search.
Judging by the photograph, the location of the ULB (half buried vertically) didn't enhance its acoustic radiation capability.
Locating the missing ULB from the SSFDR is probably on the list of things to do, mainly to assess why it was not detected either. Then try finding the QAR for good measure, you never know what it may provide.