Are you done with PT? If so, slow and steady wins the race. Keep up with the stretching and start adding weight to the bar. If you were a wide grip bencher, rethink that and work on keeping your elbows in.
Everyone is different but I was back to my former bench in 2 years. That seems like a long time but give my age , extent of the injury and time away from the weights, it's a damn good comeback. I showed my PL meet to my surgeon and he cringed. I thanked him and went on my way.