We still cannot use exosomes legally in the USA....FDA hasn't approved them for anything!
Exosomes still cannot be sold and used in humans in the USA for any indication because they are drugs (per FDA) and have no FDA approval. The approved IND does not change that. There are still some big big hurdles.
Anyone selling or using exosomes in humans in the USA right now needs to close their barn door or be on the lookout for the next FDA Warning Letter.