3 days after having da vinci surgery for endometriosis I have been having brown spotting for 2 days now. Is this normal?

Spotting. That is not unusual. It should go away in a few days. If it persists, see your gynecologist for a follow up visit.
Possibly. Ask your gynecologist or infertility surgeon whether if they used an uterine manipulator. These manipulators can cause some spotting after surgery for a few days. As long as there's not intense pain and fever, what you're describing is probably normal.
Probably. Some amount of vaginal spotting or light bleeding is normal after a hysterectomy regardless of how it was done. What you describe is not unusual.