Does anyone know the exact pin routing for the capacitive touch (FT6206) on this Adafruit 2.8” TFT touchscreen shield?

https://www.adafruit.com/product/1947

I already figured out the SPI display wiring (ICSP / D pins) and the display works correctly.

However, I am trying to use it with an ESP32 instead of an Arduino Uno.

What works:

• TFT display (ILI9341) works over SPI
• Wiring for MOSI/MISO/SCK/CS/DC is confirmed

Problem:

• Capacitive touch (FT6206) does not show up on I2C scan on ESP32
• Arduino Uno with the same shield works correctly (touch is detected)
• ESP32 I2C scan returns no devices

What I am trying to understand:

• Is the FT6206 directly routed to A4/A5 only on the Arduino UNO headers?
• Or are the touch SDA/SCL lines available anywhere on the breakout pins?

I suspect the touch controller is internally tied to the UNO I2C bus (A4/A5), but I want to confirm the actual PCB routing before modifying wiring.

Any schematic / pin mapping would help a lot.