As you mention, the most sad part about it is actually the childhood memories, but I still have the memories of course, they're just a bit more "facts based" than re-living experiences.
Luckily, I didn't lose my inner ear or even inner monologue like in another reported case [0]. I do play instruments, so I guess I was/is musically inclined to some degree. I still have ability to imagine music exactly like I would hear it, unlike a friend with aphantasia who can't.
Another interesting detail is that I regained the ability before losing it again (Covid re-infection), and during this time of recovery I could gradually see grey, blurry images that got better and better. It's like the image generator in my head didn't have capacity to create full blown images, but only low res ones. Which makes me believe that in my case the "image generator" was damaged as I couldn't even dream in pictures, while for most people with aphantasia that's not the case, as they can dream normally.
On the bright side, I don't get horrible, lifelike images popping up in my head anytime I hear about something disturbing. Not that that was a big problem, but it's something you notice. It makes me believe that people with aphantasia might be better at coping with disturbing events, as they don't have to re-live the experience visually. But that's just a theory.
[0] https://www.businessinsider.com/covid-stopped-having-dreams-...