How many reps can you do super strict with slow eccentric? 20? 30? 40? Plenty of room to progress.
You can grow on 30+ reps or someshit like that albeit inefficiently, progressive overload is still the name of the game, but at that point it becomes plain annoying to do it. Fuck standing around for 30 reps.
You can drop set or reduce rest times to up the intensity or use blood flow resistance training which is kinda purpose built for rehab/post injury.
Also clarify with your surgeon or other medical professional as to how much you can/should lift. The prescribed lifting restrictions obviously lessen as you heal so on the off chance you’re actually allowed to lift more ask.