Updating this thread: I'm really improving. This is up there with the best I've been since my noise injury in May 2019 that started this nightmare. I would say I'm a very solid 70% recovered. I can function somewhat normally and am carefully reintegrating back into my social life.
I went to a wedding in a major city a few weeks ago and wore heavy duty foam earplugs the entire time. They were playing loud music and the wedding lasted for several hours. The wedding also involved flying to and from the city, as well as going out and about during the day and dealing with horns, sirens and other noise pollution.
I was extremely worried I was gonna have a major setback, as there were multiple instances of dangerous volume levels, but the entire time I protected my ears and consumed tons of ginger ale, ginger tea, ginger gummies, etc.
I made it back home and made sure to avoid as much sound as possible for 2-3 days, and I'm thrilled to say I didn't have a setback at all.
Since then I've started listening to music again pretty regularly. Always at a safe low level and always thru a high quality speaker system. Never headphones and never cheap speakers like phones or laptops.
Lately there are nights where I just sit and listen to music for 7-8 hours straight. If you're reading this and you're a musician who has been robbed of the ability to even listen to music for years because of hyperacusis, then you'll understand why I do this.
That said, I still force myself to take a day off here and there, just to make sure.
My ears still lightly burn now and then, and I still feel pain when there's a loud sound, but the constant intense noxacusis has fortunately subsided. My goal now is to prevent another setback at all costs. This means completely avoiding talking on the phone or using laptop speakers for many years, avoiding indoor concerts, movie theaters, sporting events, etc. It also means taking a day of "noise rest" every few days just to make sure I don't overdo anything.
I'll update this thread if something changes, there's definitely room for more improvement but if things could just remain like this until better treatments arrive I'd take that in a heartbeat.