Welcome.My 22-2 CCP has huge front deck space. It is flat all the way to the bow.I don't know if the "coffin" box was standard or an option. Mine had one and I took it out for even more front deck room. Good luck.
No, I do not have it anymore. It did have about 2" of some kind of foam that was turning into dust but it was sealed in fiberglass so it still basically did it's job but not that great. I do not remember how the front section drained. The rear section was set up as a fish box and had a 1.5" drain to a thru-hull in the side. I do not know if that was original or not. The box was very heavy. I replaced it with 2 162qt Igloo Marine coolers with cushions that I can put in and take out as I please. I used a router and dug out recesses in the deck, coated them with epoxy and paint, then mounted wide SS "footman's loops" that I can hook a rachet tie-down strap and hold them in place but when they are out, there is nothing to trip over.
Note that 20 foot CCPs have a smaller coffin.
Here's the coffin on my 22-2CCP. Does your coffin look like this?