How can i blur the pillarbox?

Unity Engine
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1

Hello! I’m making a 2D platformer for mobile and I use a fixed 16:9 resolution. On some phones, unity add black bars to the sides. Can I change them to display my game blurred? Like in the image below:

2

This is called a bokeh effect. There’s shader tricks you can do.

There’s also complete assets on the store, such as this: