Part of getting stronger and building muscle is being in an optimal enough state in the training session so as to be able to impart a large stimulus to the muscle. If you’re on something that’s a short term performance enhancer in a training session, and it allows you to push either heavier weight or more reps of the same weight, this is going to equate to greater training stimulus that *can* lead to greater strength and muscle gain (assuming you recover properly). It’s not going to lead to long term gains via the same mechanisms as other AAS but if it lets you push harder, you have a greater stimulus you can recover from. Assuming you DO recover properly.
