My arthroscopy was for debribement of the sinovium, and to allow for a stress x-ray to be carried out for investigation of any damage to the Anterior talofibular ligament so possibly a little different to your problem.
The reason for the investigation was due to 14 years of repeated sprains, and an MRI which the consultant refered to as “A bit of a mess”.
The arthroscopy itself was fine, a day case in hospital, turned up at 7 am, 3rd on the list, in recovery by 1:30 pm. Initially was given morphine for the pain, then dicofenac, and packed off home at 5:30 the same day with codine and paracetamol which just about takes the edge of things. At least I don’t need to get up to the toilet now!
My joint is reasonably mobile if you factor in the ridiculous bandage, and weight bearing is uncomfortable, but doable. I was sent home without crutches, which I think was very mean of the physio I saw as getting around is nearly impossible without them despite her claims to the contrary.