Hi Alexandre,
Thank you for contacting Syncfusion support.
Yes. As per the Rider JetBrains documentation, it supports the .NET Core web application. So, it should be our Syncfusion components are compatible to use in Rider JetBrains. However, we have created a Blazor app with Syncfusion components in Rider JetBrain as per their documentation and it is working fine.
You can refer to our getting started for how to import our NuGet package and its configuration details. (Steps are similar one to use with JetBrains)
Could you please get back to us with more information if you faced any issue with that or need further assistance?
Regards,
Muthukumar K