According to Sasha Chapin when interviewed in Clearer Thinking (https://podcast.clearerthinking.org/episode/215/sasha-chapin-raising-our-happiness-baseline/, at 1:00:30), you can cure aphantasia by reconnecting the verbal and visual parts of your mind, such as by verbally describing your surroundings and then immediately closing your eyes and attempting to revisualize them (supposedly there was also a blog post about this that doesn't seem to exist anymore https://news.ycombinator.com/item?id=39904035).

I will commit to spending at least 5 minutes every day this year for this exercise. Resolves yes if I can create a memory palace with at least 5 objects by the end of the year.