I want to ask if you want to make GeoJSON geometry in react-leaflet in reactJS that is Polygon but no results come out, if you use only 2 points, such as element["geometry"]["x"], and element["geometry"][" y"], but if the Polygon is like this it is also almost like an example Point;

element["geometry"]["x"],
element["geometry"]["y"],
element["geometry"]["x"],
element["geometry"]["y"],

Do I need to add more parts of my coding so that Polygons can be read on maps?

And I read the link fromLink1 and Link2