I'm the same. As a student, I could vividly picture the page of the book containing the details of whatever problem I was working on. I have close to zero artistic and design ability, but am very strong in engineering and spatial reasoning.
Conversely, I have aphantasia but can draw reasonably well from memory (at one point well above average, but I'm about 30 years out of practice).
There are people who can "trace" what they imagine, but it doesn't appear that being skilled at drawing is that closely linked to ability to visualise.
An interesting thing, though, is that if I draw from memory my lines are more precise, while if I draw from something I can see, I will sketch out and refine. I think the two are quite different skill sets - drawing what you see often requires paying attention to spatial relationships and transferring those to the drawing to get proportions right etc.