They don't call it C++ because that sounds too difficult. But it's literally, not like a simplified subset that compiles into an IL using a formally proven tool, but as in literally compiled using GCC as, C++.

it's literally the hello world of micros. get an arduino, plug it into the usb, install the ide, new -> example -> 01. Blink. Press Run. Cool you have now blunk a led. Now use AI to draw the rest of the owl.

It's C++, and basically what Arduino gives you is

  int main() {
    setup();
    for(;;) loop();
  }

I'd assume the average user on HN should be able to figure it out pretty easily.

Good thing LLMs exist now