Funny, i have one vivid memory of visualizing something as a child as well, i was taking karate, and the teacher was facing us and we were supposed to mirror what he was doing and i vividly remember seeing a 3D model of him in my head turned around, i remember being so excited cause I’ve never had mental images like that, so i told my family and they treated it like a complete non issue.

I’m sorry i don’t, i just did the eye rubbing thing.

I have aphantasia. And also extreme crippling insomnia, it has been the last 3 or so years that i learned that other people can actually visualize at all. I always thought it was a metaphor. In my searching about a way to potentially improve it I found this article.

https://photographyinsider.info/image-streaming-for-photographers/

And it absolutely cured my insomnia. I can sleep easily for the first time in my life. Didn’t do a lot for the aphantasia but i did manage to successfully get an image or two a couple of times. Mostly i just love that i can finally sleep without hours of lying in bed beforehand.