Her other symptoms, particularly the fatigue, do seem to improve (though the weather and being about to be outside impacts it a lot, so she had a huge setback 2 winters in a row now), though very slowly. I like hearing that for you the brain thing has improved over time too, thanks!
It's been a long ride, coming up on three years. Because of the symptoms I was prompted to invest in self improvement as well. I am much more diligent about regularly exercising, eating better, minding my mental health* and minding my sleep; and there are still bad days where I can't concentrate at all. But things are getting better overall.
* Every day I don't read or watch the news I'm happier.
Also, if that can help, contrary to my previous beliefs, light therapy is no bullshit. I thought it was another pseudo science but studies are in fact proving that it’s incredibly effective (but it’s pretty inconvenient to incorporate in your habits).
For me it's gotten better. I got sick in August 2021, the major effects (fatigue and brain fog) were most pronounced between September and February, and I've been steadily improving since. I think I'm somewhere around 80% pre-Covid capacity most days.