Most GPIO pins are brought out to headers, similar to the Pico pinout, though some internal pins (like GPIO23/24) are used for the on-board LED and button. Resources for Design and Fabrication
It sounds like you're looking for the (circuit diagram) for a device labeled YDRP2040 . However, this identifier is not a standard, widely known module from major brands like Raspberry Pi (RP2040), Waveshare, or Adafruit. ydrp2040 schematic
3V3_EN (enable pin for the regulator), VSYS (raw input voltage), and 3V3_OUT (regulated output) are exposed for peripheral power.SWDIO and SWCLK are exposed on a standard 3-pin debug header (often a Tag-Connect footprint or standard header).