Hi Sema,
Thanks for contacting Syncfusion support.
Yes, Syncfusion ASP.NET Core controls are compatible with ASP.NET Core Razor projects. We can use Syncfusion ASP.NET Core controls in the Razor pages also. Please refer our below ASP.NET Core documentation for more details about it.
Please get back to us if we misunderstood your query.
Regards,
Muthukumar K