Hi Kunal,
Thank you for contacting Syncfusion support.
We want to ensure that Syncfusion React components can be used as front end and .NET Core Web API as backend as usual. But, we do not have any specific .NET Libraries to control the Syncfusion React Components in WebAPI since WebAPI only handles the data.
Meantime, we request you to share more details such as descriptive step by step explanation of your requirement for clear understanding in our end in case we misunderstood your point.
Please get back to us if you have any queries.
Regards,
Jesus Arockia Sankaran S