Any way to use external power supply like apply 5v directly to the gpio or something else because I noticed that the USB c is a full thunder bolt and USB so you.can connect to a PC for adb
Power input alternative
You can either use a c-type dock that powers the 5b and breaks out other ports(best solution) or you can apply 5v power via gpio as specified on the wiki. Be careful with this option as it bypasses fuse and vreg
Can I use any 5v pin or there’s a specific pin
Please refer to the radxa wiki on the 5b for details, but short quote from there:
5V PoE power from the GPIO PIN 2 & 4