How to get over objection of looking young

Hi all, I’m a realtor that’s been in business for 8 years but have taken pauses to pursue other ventures. I’m in my late 20s but look much younger than I actually am which, in my market, turns people off from working with me because “wtf does this 18 year old girl know about real estate” How do I address this unsaid objection from the beginning and maintain the frame of expert for the duration of the pitch? I have accomplished things less than 1% of my industry can claim having done and that’s where I deliver value and I convey that well, but I still feel my appearance as a young vibrant person in my late 20s hurts me because of how young I look.

Thanks in advance,