This icon is a part of a collection of Przesuń w dół flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality. Both PNG and vector are available.
The "swipe down" symbol here consists of a circle, with a straight line extending down from its lower half in the middle, with two diagonal, upward-reaching lines extending upwards from the end of the line. It is a circle with a downward-pointing arrow extending from it.