Question - Create circular area around markers

[JoaoPVilar]

I am developing a mobile app with Unity that displays a map with several markers.
I am trying to create a circular area around the markers in the map just like the image below:

I started by creating a material attached to the markers that would increase and decrease depending on the Zoom level, but it doesn't work so well and I don't really think that's the best solution here.

Anyone knows how to do this with UnitySlippyMap's code?

Thank you.