If you checked out some comparisons made by YouTubers you would see the standard “black screen” AOD on Samsung devices only use 1-2% less battery life; and on certain models they use significantly more than iPhone AOD.
Samsung AOD always drain the battery. I’ve owned Samsung devices since the Note 3 thru to S22U. The difference with AOD on and off was approx 1-1.5% battery drain per hour on standby.