Thanks for trying to help! I answered in another comment, so you can see a better reply there, but I've been trying (a lot) of these things and the short version is that it seemed to work when my brain had been given some time to heal, but repeated covid infections might have made it permanent in my case, or at least given the prospect of future infections. But time will tell. My smell/taste survived the last infection(s?), so there might be some hope that it gets milder.

It's so weird, as I know exactly which "muscle" to trigger to make it happen, which I guess someone having aphantasia wouldn't instinctly know, but it just doesn't do much.

-edit- Oh, forgot to mention, in the beginning when I trained on visualizing again (back when it did work), I got _so_ exhausted in my brain afterwards, it was like really trying to used some damaged "muscle". I find that really fascinating. I'm not able to invoke such exhaustion in other ways, that quickly.