Never had that taste issue, but they definitely heighten my sense of smell as well. I love LSD buy I feel like shrooms have more potential for that kind of stuff, they help people quit smoking as well. They definitely change something within the brain, usually for the better (as long as you don't neglect set&setting).
Now that I think about it I remember reading something about psychedelic-induced neurogenesis, and IIRC it has something to do with sigma receptor agonism (I believe psilocin does that as well), but I'd have to recheck it.
I'd try it myself if I had covid, though I'm doing my best to avoid catching it lol.
A friend of mine lost her smell as well and I told her about my idea. Maybe I can convince her to be the first test subject.
Maybe the better plan would be to have a normal shroom trip and then start taking microdoses.