Working with arrows in Figma is not so smooth and comfortable as in Sketch. Just putting a straight arrow is basically all you can do.
In Sketch, you can press Enter and then prolong the arrow on every side and angle. That’s more native and quick than drawing a line and then making it an arrow in Inspector.
In cases when you’re making complicated user flows and need a lot of curved arrows this work with arrows becomes a challenge. And using any special plugins for this work with arrows seems too complicated.