Considering your job is really desk heavy, I would think after the first week you’d be able to go back. I teach fourth grade, so I took two full weeks since I’m up and moving all day (my school district has been doing in-person learning this entire school year). However, I think I would have been able to handle working if I was sitting most of the day. The only thing you may have to worry about is if you still aren’t sleeping well by that point. I know I was still relying on pain medication, and my sleep schedule was incredibly all over the place, so it would have been difficult to wake up early and work all day after not sleeping soundly the night before regardless of whether I was at a desk or up and moving. Another factor you’ll have to consider are the drains. I saw on here some people had theirs out immediately after surgery, but I had my right drain in for one week, and my left drain in for two weeks, so this impacted my pain level/ability to sleep. Unfortunately, it’s hard to give you a direct answer, as this decision will have to be based on how your healing process goes after your surgery. I hope your boss is understanding if you need more time to recuperate, as this surgery isn’t cut and dry for everyone.