How to stretch the icon?

I want to set an arrow icon for a button. Besides, I want to adjust the thickness by stretching the SVG image. How to realize it?

```XML
  <Grid Width="400" Height="300" >
      <Rectangle Stroke="BurlyWood" StrokeThickness="2"  StrokeDashArray="4 2"/>
      <Image fa6:FontAwesome.Icon="Solid_ArrowRightLong" width="40"/>
  </Grid>
```