Hi Syed,
Thank you for contacting Syncfusion support.
We would like let you know that, we can develop the Essential JS 2 component in ASP.NET Core 2.1 platform with Razor pages. Please find the following online documentation link for creating Essential JS 2 application with ASP.NET Core and Razor pages.
We have also prepared the sample for your reference with ASP.NET Core 2.1 and Razor pages. Please find the sample from the following location.
Let us know if you need further assistance on this.
Regards,
John R