Doctor protocal varies, as does healing/progression for the individual.
As a general rule of thumb from someone who has been through it and on the other side. The MPFL isn't an easy surgery, and I wouldn't plan on being back to normal life/speed until about 12 weeks. I was back at work and driving at about 2 weeks, but I sit at a desk. If you need to be on your feet and active for work, it will likely be longer. The best thing my surgeon drilled into my head was be realistic in your expectations and goals
unfortunately the most accurate info is going to come from your surgeon in terms of bracing, timeline, goals, etc. - perhaps you could contact his office to see if they have his standard protocal to provide you with?