The Eskaya script is not yet in Unicode. The script has a tentative allocation at U+1A300..U+1A75F 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:

2000-02-22 Philippino characters (status report) — Takayuki K. Sato ( WG2 N2194.doc,  L2/00-097)

2011-03-03 Indonesian and Philippine Scripts and extensions not yet encoded or proposed for encoding in Unicode — Christopher Miller ( L2/11-091)

2013-11-08 Additional Information on the Eskaya Script of the Philippines — Anshuman Pandey ( WG2 N4499,  L2/13-229)