That sounds like antaphasia based on what I've read. You might be interested in the materials available at https://aphantasia.com/ https://aphantasia.com/ They

That sounds like antaphasia based on what I've read. You might be interested in the materials available at https://aphantasia.com/ https://aphantasia.com/ They have a more in-depth test there called the Vividness of Visual Imagery Questionnaire