This article below indicates that family tree data appears at https://giris.turkiye.gov.tr/Giris/ .

https://www.quora.com/I-want-to-search-birth-marriage-and-death-records-from-Turkey-from-the-beginning-of-the-20th-century-Does-anyone-
knows-about-such-website

or https://tinyurl.com/y5qqjvod

I am eager to know: Has anyone in Istanbul seen such information at https://giris.turkiye.gov.tr/Giris/ ?

Daniel Kazez
Springfield, Ohio
www.dankazez.com/elh-kaz-fre/

Dear Mr. Kazes, 

To use this application :
a. you have to be a Turkish citizen with a Turkish id. no.
b.you have to apply for an official password.

In fact once you request, it gives a family tree ( a family tree which begins with mother & father and goes up).  They translated and put on-line the ottoman census records up to the beginning of the 19th century.

Metin Delevi

Istanbul - Turkey