The Xilinx Zynq UltraScale+ MPSoC (ZU11/17/19EG) devices does not support a dedicated JTAG_TRST signal. Consequently, Pin 25 of Board-to-Board (B2B) Connector 2 is No Connect (NC) in G35M SOM Hardware User Guide.
(G35D development kit) Carrier board is compatible for other iWave SOMs and also supports JTAG-TRST signals. As per G35D design, PS_JTAG_TRST signal is present in Pin 25 of Board to Board Connector 2 . For detailed pinout configurations specific to the ZU19/17/11EG SOM, please refer to the SOM Hardware User Guide.
For further inquiries, please get in touch with mktg@iwave-global.com
Please find the detailed G35M product information in the below link,