Same boat - 20 years experience, in Oz, with aphantasia... I've only realise in the past month that I do poorly on Live Coding interviews because since the interview is on the clock I immediately start coding so I have something to show, but since I can't picture anything in my minds eye I'm literally coding blind - rereading the question over and over hoping the solution will come! So after realising this I've started using an A2 notebook to draw out the problem, work my way through the problem on paper, and finally map out a solution (still on paper)

... then like magic, the code comes naturally (I'm guessing that's how normal people think when programming)!