Amazon Managed Grafana Canvas plugin - unable to upload SVG icons

I am using Canvas plugin in Amazon Managed Grafana and i want to add a SVG icon. In Grafana Cloud you can directly upload those icons. However, in Amazon Managed Grafana that doesn't seem possible. On the other hand, I have tried to create an object in a S3 bucket and use the URL of the object in Canvas but it doesn't work. Is it really possible to upload SVG icons in Canvas?