How to remove the white border from a circular icon?

Hiya everyone,

Hopefully this is a very easy fix and my ask makes sense? 😁 I’m trying to crop this image of a chatbot icon to completely remove the white perimeter border. So that only the exact image of the chatbot remains. I’ve tried cropping it but that only works if the item is not circular. Is there a way to adjust cropping to exactly crop around the perimeter (circumference) of this object to remove any white border? I’ve copied the object into Chat|M365 Copilot to ask it to do this but I am still left with an icon in a square box.🤯🤔