The Elymaic script is not yet in Unicode. The script has a tentative allocation at U+10EC0..U+10EDF in the Roadmap to the SMP for the Unicode Standard.
A number of documents towards encoding the script have been submitted to the Unicode Technical Committee:
2017-02-01 Preliminary proposal to encode the Elymaic script — Anshuman Pandey ( L2/17-055)
2017-07-17 Proposal to encode the Elymaean script in Unicode (supercedes L2/17-055) — Anshuman Pandey ( L2/17-226)
Recommendations to UTC #152 July-August 2017 on Script Proposals ( L2/17-255) (See point 5.)
UTC #152 Minutes ( L2/17-222) (See D.10 for decision and action items)
Recommendations to UTC #153 October 2017 on Script Proposals ( L2/17-384) (See point 6.)
UTC #153 Minutes ( L2/17-362) (See C.3 for decision and action items)