Hi Massimo,
Syncfusion provides toolbox support for WPF, Windows Forms,
ASP.NET Web Forms, UWP and Xamarin platforms.
We are also providing .NET Framework and .NET 5.0\6.0 in
Visual Studio 2022 Toolbox. After installing the setup, the toolbox will be
configured automatically in Visual Studio if you’ve selected the “Configure
Syncfusion Controls in Visual Studio” option.

Please follow the instructions below to setup the toolbox in
VS2022, if you’ve already installed the setup.
https://help.syncfusion.com/common/essential-studio/utilities#configuring-toolbox-in-visual-studio-2022
If
you have installed Visual Studio after installing
the Syncfusion installer, click on the Recheck
button at the bottom of the Syncfusion Control Panel to
refresh the recently installed software in your machine.

Then close and re-open the Syncfusion Control Panel
and click Toolbox utility, it will enable the VS 2022 checkbox.


If the problem is still not
resolved, please follow this guidelines and
share the installer logs generated by our tool to check the problem.
Let us know if any concerns.
Regards,
Jeyaseelan M