iGrid.NET 10.1 with WinForms designer support in projects targeting .NET 6 has been recently released.
As expected, some advanced design-time features are still not available because their basic types in .NET 6 are not implemented by Microsoft yet. However, this does not prevent us from placing the control onto a form, resizing it interactively and changing most of its properties like we can do that in .NET Framework projects.
The missing design-time features will be added as their support appear in the platform SDK.