Which pins are I2C

Official Hardware Nano Family Nano ESP32
1

This is a random question but i could not find which pins are the scl and sda

2

The core should create symbols named SDA and SCL so you could write a simple sketch and print them out on the serial port.
They should contain the digital pin number for these signals.

--- bill

3

depends on board used,
some boards allow to overrule the SDA and SCL

4

For the Nano ESP32, SDA=A4 and SCL=A5.
You will see this documented if you search for i2c in the Nano ESP32 cheat sheet.