I measured 40 uA on an Eneloop. SammysHP did a bit more scientific testing and saw 40-60 uA: Sofirn SP10 Pro (AA/14500/Andúril 2) - now available! - #1757 by SammysHP
So I’d say your results are right inline with the SP10 Pro. Not saying that’s perfect though. If you think it could/should be lower, I’d have to look again at the peripheral tables to see what is active in sleep mode and see if there is anything else that could be slowed down or shut off.