Greetings from Syncfusion.
Query: "can I have a rounded Corner Tabviews ?"
Yes. But in SfTabView, we don't have direct support for this requirement, and we can achieve the same by adding the desired view inside the Syncfusion Border
control in header view of TabItem as per in below code snippet.
Code Snippet [XAML]:
To know more about border customization, please refer the below link
Based on your requirement, we have prepared the sample which can be downloaded from below link
Please check and let us know if you have any other concerns.