Not “long Covid” but my sense of smelling/tasting is still not the same after 6+ months. I had mild symptoms, but my sense of smelling and tasting were totally gone for a few weeks. After a few weeks it turned almost back to 80% only intense smells (like gasoline, garlic and diapers :shrug:) were filtered out. Since ~3 months these things stink intensely with an indescribable way… (I guess the diapers always did ;))…
My story - had covid in february 2021, +-flu but complete loss of smell. But not for taste - all major tastes were there (so salt was salty, sour sour etc.) but all the fine tastes (ie you barbecue a fine steak without any seasoning, and its amazing) were gone. The result was food that didn't taste horrible, just incredibly bland. I was super sporty, and started again almost right after it.
Smell was gone 100%. I used a home made 52% apple brandy bottle to test my smell continuously (very strong alcohol smell, strong fruity by-smells), for maybe 2 weeks it was like breathing fresh forest air, actually OK if I didn't consider what it meant. No alcohol smell. Then it gradually came back, same with fruity flavors.
After 6 months, I would say I have my smell back. But it feels like its quite toned down, all the smells are rather mild. Did some test and my own perfumes don't smell so great anymore. Some other previously great smells are mild or not so great anymore. At least nothing smells outright horribly, and all food is OK to eat (since smell affects our tastes greatly).
Smell is probably the least bad sense to lose, as long as its just about some % loss and not making many fine things smell like rotten shit.