I knew some bank folks. From what I heard, large amounts of the PPP loan money sat in the bank because some banks had trouble giving the money out. That extra money earned the banks a hefty amount of interest, and the C-suites of the bank made-off with a huge chunk of year-end bonus as a result. So while it isn't directly the PPP loan money, the bankers made a lot of money off of it.
The PPP loans that they were able to give out went to some small businesses and a large percentage of that money were forgiven. But some small businesses also had some trouble getting their loans forgiven due to either bad documentation / application / or the bank that gave them the loan did a poor job of filing the paperwork. So some of those businesses were stuck with a loan that they had to pay back or is waiting for it to be properly processed.