The ESP32S3 DevKit is a development board for the ESP32-S3 SoC from Espressif, based on a ESP32-S3-WROOM-1 module.
USB-to-UART bridge via micro USB port
EN and BOOT buttons (BOOT accessible to user)
SPI FLASH (size varies according to model
UART0 is, by default, the serial console. It connects to the on-board CP2102 converter and is available on the USB connector USB CON8 (J1).
It will show up as /dev/ttyUSB[n] where [n] will probably be 0.