posting to wrong account

I have a multi user license for QB 2023 contractor edition. Recently we enlisted the services of a bookkeeper to assist with year ends etc. After getting the company file returned to my office, I restored from her backup copy and began using the file as normal. My wife does our invoicing and we discovered after several hundred inputs that the company file she was using was the original company file before the bookkeeper made her adjustments. As a result, inputs I have made are not on her desktop and inputs (several hundred) that she has made are not on my desktop. I'm appalled that QB allows two license holders to use two different company files but more importantly is there a way to merge the data from one (older) company file to the updated file without overwriting existing data?

Thank you for any help!

Robin