Blink not working on BPI-Leaf-S3

But that also says

so it looks like a deliberate choice of a wrong pin due to hardware bugs?

A neopixel won’t do anything with a regular digitalWrite() , the Neo Pixels need to be spoken to in a specific protocol to make them light up. And per schematics it’s indeed a Neopixel (WS2812B).

Please try the inteded code for this board at

As referenced in their documentatin

https://wiki.banana-pi.org/BPI-Leaf-S3