Hi Basil,
Sorry for the inconvenience.
We have not yet implemented DropdownTree component for Blazor. But, we have already considered your request as a feature (Dropdown Tree component in Blazor platform) at our end and it's available in our queue. Usually, Syncfusion will plan and implement the features based on feature rank, customer requested count and volume wish-list.
We will implement and include this feature in any of our upcoming releases.
Track the below link to know the feature status.
We appreciate your patience.
Regards,
Sowmiya.P