The hearings were adjourned until Wednesday morning.
At least 19 people have been injured as a result of the blast.
The suspects were identified as Iqbal, Rizwan and Muneer.
Muslim faithful arrived by bus, car or on foot in the poor district of Bopp, home to the new Massalikul Jinaan mosque, capable of hosting 30,000 worshippers.
The work is expected to be completed by the end of 2020
The self-proclaimed white supremacist appeared in court via audio-visual link from a maximum-security prison in Auckland for the brief hearing
"Hagia Sophia will not be called a museum. It will be taken out of that status. We will call Hagia Sophia a mosque," Erdogan told A Haber television during an interview.