the file does not show a black fill but the app shows a black circle.
since it's to long https://gist.github.com/YutaTheTraveler/0b8c11faf997f2118d19bbd009d490ba.js
anything I create in Figma shows up as filled black.
The answer is to NEVER USE THE SHAPE TOOL!!! Figma sucks like every other adobe product, and is has many bugs that aren't fixed for years... in this case just use the pen tool... or switch back in sketch like I did.