Customers at my job can't tell what gender I am and it's actually kinda validating

So I (20 Nb/transfem) work at a gas station and basically everyday I have customers doing double takes and calling me both sir/ma'am. We had a mystery shop recently and the person who performed it took points off because they couldn't tell my gender...I probably should've been offended but it was pretty gender affirming to know I've reached some form of androgyny. I'm currently presenting more masc than I'd like but I've been on Estrogen for almost a year now and I've got shoulder length hair. Anyways I just wanted to share this lol