The German expert on everything concerning Hijras in India and Pakistan is Renate Syed ( Perhaps she can help you out.

Robert Zydenbos

Sravana Borkataky-Varma via INDOLOGY wrote on 07.07.20 03:23:

I am looking for scholarships on the Kinnars/Hijras especially in the context of rituals around the womb, menstruation, pregnancy, and fertility in general. 

Additionally, interviewees have stated that Gorakshanath in one of his many births was born as a kinnar. Hence, the Kinnar Akhara owns 50% of Nath fortunes. Love some information on this as well. 

Thank you.

PS: Apologies to members for cross posting. 
Sravana Borkataky-Varma
Lecturer, Hindu Traditions
Harvard University

Prof. Dr. Robert J. Zydenbos
Institute of Indology and Tibetology
Department of Asian Studies
Ludwig-Maximilians-Universität München (University of Munich – LMU)