I am not familiar with that type of construction but I would expect to find some sort of a rim joist and see how the joists are attached to it, maybe joist hangers.
I’m in a process of buying a house built in 2008 and I can see the neighbours have similar construction
The inspector raise this as a question mark because he is not specialised with foundation
The taping indicates a typical support framing, in some of the photos, however, it's been my experience with inspection firms, that obvious evidence of a question, is duly noted, and then addressed by the owner, by example. Which in this case would be simply by removing the insulation, at some point obviating the existence of the support mechanism.
I was going to suggest a visit to (as it's called in my area) the office of inspections. There should be someone available that could easily advise you just based upon the photos (unless they have a KGB attitude in Jersey).I've also asked or researched myself, the existence of the original, permitted, bldg. plans, which are, generally, archived in the municipalities records.
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