That would be a nice thought but too much says a hit that size would leave a crater miles in diameter and a mile in depth. Not found in New England or off coast. there have been lots of other meteor strikes that would account for the debris found, many likely from many millions or billions of years ago when the continents were in different positions.
Shape of the Cape has nothing to do with a meteor strike - I remember reading something years ago that the shape has something to do with crustal movements and uplifting/subsidence.
Ice strike is what most geologist etc agree would neatly ‘disappear’ a crater of the necessary size to cause the Younger Dryas.
If your friends found meteoric iron debris, and not scrap from WWII, then they could have a real payday - even many stony meteors are worth a great deal. The net problems are likely from WWII wrecks and jettisoned cargo; there’s a lot of crap on the bottom of oceans that has nothing to do with astronomical events and more to do with human activity like garbage scows ocean dumping.
No crater because of the mile high glacier but plenty of crescent shaped sand piled up on the back side of the melted ice from the impact.
Anytime you are in New England, comet samples will be there for you.
It's on you.