It's seem to be the same as with cilantro a genetic trait that some people have and other don't
https://academic.oup.com/ae/article/61/2/85/1756864?login=false
Dunno if that a good source as everything i found about that exept for thos page talked about the tiktok post and not science
Tldr : ( i did not read the article in full ) the smell is described as a moldy pina colada