One aspect of aphantasia that I haven't seen mentioned yet is memory of Chinese characters / kanji.
I absolutely cannot for the life of me visualize any* of the characters I can easily read and write. However, there is a trick I can do for the ones I can write: I can trace the strokes in my head in the correct direction, order, and proportion. And I have to do it by imagining the muscle movements I would use. Although I can't visualize the result, it's the closest thing I can get to seeing anything in my mind's eye.
*Almost true; exceptions exist like 十，人，个，大. But something as easy as 车 is too complicated for me to visualize, but very easy to mentally trace.
I absolutely cannot for the life of me visualize any* of the characters I can easily read and write. However, there is a trick I can do for the ones I can write: I can trace the strokes in my head in the correct direction, order, and proportion. And I have to do it by imagining the muscle movements I would use. Although I can't visualize the result, it's the closest thing I can get to seeing anything in my mind's eye.
*Almost true; exceptions exist like 十，人，个，大. But something as easy as 车 is too complicated for me to visualize, but very easy to mentally trace.