Blossoms are loooong way away, first plant has to grow leaves.
3 weeks isn't that long, roots look good and now just hope it will grow some leaves. Sometimes, the roots will grow and no leaves, sometimes other way around and sometimes you'll get both - that's what we all want. Original leave eventually dries out, and until then the roots and/or leaves feed from it. It should be left there until it is totally dry and shrunken.
Do you remember what plant is the leave from?

Is there a jade leave in the same pot - or a plant?

Thanks Rina. I dont know the name of the plant it came from unfortunately. There is a jade leaf next to it. Not a plant.

I would turn it over. Right now it looks like the root growing side is up and most of the roots aren't in contact with the soil.