How much accounting regulation is actually enforced on these? How many ghost projects or empty infrastructure with revenue booked using estimated values instead

How much accounting regulation is actually enforced on these? How many ghost projects or empty infrastructure with revenue booked using estimated values instead of real sales? I don’t doubt that it won’t be an entire haircut, but to say these function like regular bonds seems odd. Is there a contagion concern here? What other products are collateralized using these? We saw this of course with well-rated packages of loans actually being manure. Anything like packaged LGFVs with hedges? Asking because I have no idea and am legitimately curious about the possible downsides.