question

I make a demo to achieve your needs(A little ugly), here is running screenshot.

First, you need set the fresh-light image 's background is Transparent like this png(right click following image, save it).

Then I use following code, add red line in the background of fresh-light image.

<Frame IsClippedToBounds="True" WidthRequest="200" HorizontalOptions="Center" HeightRequest="200" Padding="0" CornerRadius="100">
            <Grid>
                <Rectangle 
                    x:Name="myrec"
                    Fill="Red"
                    HorizontalOptions="Start"
                    VerticalOptions="Start"
                    HeightRequest="10"
                    WidthRequest="500"/>

                <Image Source="flashsymbol.png" Aspect="Fill"  WidthRequest="200" HeightRequest="200"></Image>

               
            </Grid>
        </Frame>

Then add Animation to Rectangle in the background.

var animation = new Animation(v => myrec.TranslationY = v, 0, 200);

            animation.Commit(this, "SimpleAnimation", 16, 1000, Easing.Linear, (v, c) => myrec.TranslationY = 0, () => true);