Hello there, ktomko.
We're unable to customize a reconciliation report and we're only able to print it. You can suggest which data we need to see in a reconciliation report and I'll surely send it to our engineers.
However, we have several reports that we can run and customize. You can check out these articles for the detailed steps:
Feel free to get back to me if you have further question. I'll keep an eye on your reply. Keep safe!