Hi Tony,
Thank you for contacting Syncfusion support.
We have prepared a sample to meet your requirement. In this sample, we have set ShowIcon property to true for SfTabControl and Icon for SfTabItems. Any object can be set as Icon for SfTabItem and it can be shown/hidden using ShowIcon property. You can download the sample from the following location:
Sample:
TabControlIconRegards
Ashok Kumar M