Currently anywhere from zero to 18 total weekly sets depending on the body part. Like, zero for abs and triceps, 3 for biceps, 6-7 for shoulders, 8 for chest, around 10 for pulls plus 8 for “back”, around 12 for legs.
As a “general guideline”, the number of sets is absolutely dependent on the training goal and the reps performed per set. A ton of articles explain more. This is one from Thibaudeau and here’s one from Waterbury.