Another anon here - agree with the others above, but, don't let examiners bully you into manually producing a non-existent report. They can ask you for a "reverals report" until the cows come home, but if it doesn't exist, it doesn't exist. They are free to go manually review a sample of a hundred overdrafts and identify the reversals by hand.
In the meantime, I'd drop everything on my calendar and do that myself. Document for them a sample (perhaps 20, or 50 cases) of overdrafts, and show if any had the fees reversed. If any did have a fee reversal, document 5 different ways why the customer qualified vs the customers who did not qualify or receive the reversal.
a) this customer requested refund, the others didn't
b) customer who got refund has had an account since 2003, the customer who didn't just opened it in 2019
c) customer who got refund also has a business account or CD with $100,000 in it
d) customer who got refund told us he/she was in hospital
Basically treat their unreasonable request as a trigger to do the exam for them. If you can document for them that you are on top of this issue, they will stop digging.
Possible exam finding should be, at worst: bank agrees to perform quarterly monitoring of fee reversals, or, requires upper-level approval for fee reversals, etc. This is an OD practices risk mitigation issue; don't let them steer it towards UDAAP.
Also share with them CFPB's clarification of "abusive" released this week (which is a much weaker standard than before, since it's no longer arbitrary and subjective).