The Wancho script is not yet in Unicode. The script is not yet in the  Roadmap to the SMP for the Unicode Standard.

A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2:

2017-01-23 Preliminary proposal to encode the Wancho script in the UCS — Michael Everson (WG2 N4785,  L2/17-042)

UTC #150 Minutes ( L2/17-016) (See C.11 for decision and action items)

2017-03-09 Proposal to encode the Wancho script in the UCS — Michael Everson (WG2 N4787, ( L2/17-067)