Not the cut out midships, further aft. I see where the RHIB on davits is located, but if you go almost to the stern, there’s a cut out on the bottom deck with what looks like a side scan sonar apparatus. I was just noting it as I’ve mostly seen that setup all the way at the stern as opposed to the side.It looks quite the same as the AOPV's boat decks.
Methinks it has to do with the need to deploy in the Arctic.
Could potentially be used for other purposes, but I'd be surprised to see the Navy sacrifice a ship's only small boat redundancy on anything other than an exceptional basis.
Supplemental capabilities instead borne out of the modular mission bays at the back.