Hello Emil,
For the time being, you can consider wrapping the Kendo jQuery TreeMap widget by following the sample project here: https://github.com/telerik/blazor-ui/tree/master/common/kendo-in-blazor.
Since you created this feature request, you are automatically subscribed for status update emails, and once we know a release for such a component, you will get that notification.
Regards,
Marin Bratanov
Progress Telerik
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