The Ranjana script is not yet in Unicode. The script has a tentative allocation at U+11500..U+1157F 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:
Review of Indic‐related documents and Recommendations to the UTC ( L2/12-378) (See point II.)
UTC #133 Minutes ( L2/12-343) (See D.10.1 for decision and action items)
2014-09-23 Comparison between Ranjana proposals — Deborah Anderson ( L2/14-221)
2016-01-06 Towards an encoding for the Ranjana and Lantsa scripts — Anshuman Pandey ( L2/16-015)
UTC #146 Minutes ( L2/16-004) (See D.14 for decision and action items)