Thanks to the efforts of Anshuman Pandey, the Chorasmian script—the local development of the Aramaic script, which was used on coins, ossuaries, and some leather and wood documents up until about the 8th century CE—has been encoded in Unicode in the range 10FB0–10FDF.
The proposal for Chorasmian can be seen at the following link: L2/18-164R2 – Proposal to encode the Chorasmian script in Unicode, which also has references to earlier versions of the proposal.