It looks like they charge for the materials to offset the cost. This whole program, to ensure Americans get what they pay for in consumer items, is a much better use of my tax dollars than, say, paying for rich kids college loans.
Not the only example, simply one of the first that popped up in my brief (~30 seconds) search.
I have seen baseless claims that the current inflation is being exacerbated by the student loan relief which hasn’t occurred yet, but as I said, they are baseless