Like since being born or you had covid?
I think I have a nice sense of smell but nothing abnormal I like when the bus gets close to some food and soap factories and I get a few seconds of amazing smells, my room smells like me and my brothers like him my mother's house smells like dogs my cat smells of whatever she was sitting on last and in my culture weird as it may sound sniffing someone's hair gently is a action of affection usually forehead hair for adults towards their children(related) and sniffing the back of the neck for romantic partners
I've never had covid, but I geniuely just think that I just don't smell things often. The only smells that ever stand out to me are food smells and perfume. Of course trash and stuff but in general Its hard for me to recognise something unless I haven't been in the area for a long time.
All these stories with normal human beings yet their insane ability to smell scents.
I have such an odd sense of smell were unless it's something horrible like burnt food or something I won't smell jack.