I think you’re conflating two very different cognitive processes. Aphantasia is very specifically the inability to visualise Images. Maybe, in a broader sense the inability to visualize (specific) senses in general. Lack of an inner-self and the resulting inability to self-reflect might be a thing but it sure is a very different phenomenon from aphantasia. Your inner self isn’t a physical sensation that you’re trying to visualise a memory of. And even anendophasia, the lack of an inner monologue, which is closer to what you’re describing than aphantasia, although still not quite it, does not seem influence self-reflection capabilities.

reflection is impossible

The article you‘ve linked there is about aphantasia. The incapability to visualise images does not hinder you from reflecting on your thoughts.

Yea, German here. I‘d love for someone to explain this from a US-American perspective. In Germany, if you want to vote, you’ll need a valid personal ID or passport. Granted, you are also required to have at least one of them by the age of 16 but if you don’t, for some reason, it’s not really that hard to get one (if you’re a German citizen). Having a German ID/passport is also an automatic voter registration.