The regulatory reality
Anything that reliably raises testosterone in healthy men is either a controlled substance or a prescription drug. Over-the-counter 'boosters' are, by definition, not that.
What the studies actually show
Tribulus, fenugreek, D-aspartic acid, and most 'test blend' staples show either no effect or effects so small they're within measurement noise in trained men.
What actually moves testosterone
Sleep, bodyweight in a healthy range, sufficient dietary fat, resistance training, and correcting real deficiencies (vitamin D, zinc if deficient). None of that is in a $60 tub.