I would suggest that someone who does not lack multisensory mental imagery—what scientists refer to even for non-visual senses—may be able to vividly recollect past events from a first-person perspective (often described as a time travel flashback) using the senses that are not affected. Therefore, they may not be severely impacted or affected at all.
I would say that I do have SDAM, although I don’t have an official diagnosis. In fact, I find the ‘S’ (Severe) label a bit overstated. The reason I identify with SDAM is that I have multisensory aphantasia, which means the only way I can access my past is through semantic memory. I am unable to re-experience past events from any sensory perspective, nor can I project myself into the future in that way.
SDAM Stands for Severely Deficient Autobiographical Memory
See also :
For those interested in taking a test: http:/www.troublewithfaces.org/test-yourself-1
It seems to have been updated here : https://www.canva.com/design/DAGIfi2OYPg/qMvuxAw9fkWZ_bWDxaVnWA/edit
I have multi sensory aphantasia and got a ASD diagnosis few months ago that spotted a high suspicion for ADHD as well…
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Thanks