Adafruit ESP32-S3 Manual page 212

And upload this example to your board. The ESP32 should scan and find WiFi
networks around you.
For ESP32, open the serial monitor, to see the scan begin.
For ESP32-S2, -S3 and -C3, don't forget you have to click Reset after uploading
through the ROM bootloader. Then select the new USB Serial port created by the
ESP32. It will take a few seconds for the board to complete the scan.
If you can not scan any networks, check your power supply. You need a solid power
supply in order for the ESP32 to not brown out. A skinny USB cable or drained battery
can cause issues.
©Adafruit Industries Page 212 of 263