Mine started to return after a couple of months. Everything smelled like vanilla extract. This is not as bad as it sounds, because my 12-year-old son smelled like vanilla extract instead of like filth.
My sense of smell and taste are not back to normal after a year, but the vanilla-universe is occasional now.
...when I turned 70, both my sense of smell and taste basically disappeared...never came back....maybe it is a “senior” thing, but still....when they say “Wake up and smell the coffee...” I am lucky to say that I did, indeed, wake up, but I cant smell the coffee any longer....