Anyone with Aphantasia or are curious about it might like this fairly recent article that eventually gets into a theory of the mechanics of different cases of Aphantasia and what might be happening behind the scenes.

Aphantasia: In search of a theory https://onlinelibrary.wiley.com/doi/full/10.1111/mila.12432

I find it incredibly surreal to read current research on how my own mind might be working and finding parts of it quite relatable and insightful.