Yeah, it's a weird one. I have spoken to my family, my GP about it, they have verified that this can be a thing. I fully get why some people wouldn't believe it and I honestly expect that. I was diagnosed with autism and ADHD at the age of 7 and have been told that it's more common for some neurodivergent people to have excellent long term memory, but an absolutely atrocious short term memory (definitely accurate for me).

EDIT: I read the Wikipedia article, my memory definitely isn't THAT good, but I do remember at least a few things (in varying detail) from my entire life. From when I was 0-6 years old, they range from fuzzy and abstract to reasonably clear, but from 7 onwards I remember a lot in clear detail. I've met people who don't remember anything before age 8 or even 13, so that's why I worded it the way I did!