It’s probably going to vary plan by plan and practice by practice. That being said, if you’d been seen by my surgeon, you would’ve had to have been on a pre-surgery liquid diet for a longer period of time than someone with a lower BMI, and might have had to go in for blood work while you were on the pre-surgery diet.
All plans and practices seem to require some form of supervised medical weight loss program and a psych evaluation, as well as a screening for sleep apnea if you haven’t already had one. Also, though I haven’t heard it mentioned here, my surgeon requires that patients get their A1C below 7 before surgery.