There are some smelling notes in the Single Note thread.
In addition we had a discussion about it a while back in another thread, but for convenience I’ll repeat here what I said there:
There is an essential oil of cannabis sativa flowers that is widely available and is produced mainly for the perfumery market. Depending on the cannabis variety it can be either virtually free of THC or high in it - the latter would not be legal in the UK but the former meets the Home Office rules and can be sold freely.
I understand however that the essential oil does contain the aromatic substance (caryophyllene oxide) used to train dogs to sniff out illegal cannabis . . .
Hemp oil is different - that's made from the seeds and is used in cooking among other things - it has no appreciable aroma.