When clicking on enter button in a Syncfusion drop-down widget, the first value in the drop-down is selected automatically, while the tab button select the choosen value, the enter button select always the first value
By default, first dropdown list item value is selected & focused on opening the dropdown popup, so press the enter key, its automatically selected the first value. This is the default behavior of Drop-down List component.
Please let us know, if you have any concern on this behavior and clearly explain the tab key press related concerns.
Regards, Ashokkumar B(Syncfusion).