WinAppDriver how to select item in ComboBox

Question

I have problem with selecting item from ComboBox, I able to unfold ComboBox but can't select one of the items

Simply

var comboBEle = winDriver.FindElementByName("Combo1");
comboBEle.Click();                                       // unfold comboBox
winDriver.FindElementByName("Item1").Click();            // don't work

I tried also:

var comboB = sapSession.FindElementByClassName("Combo1");
var selEle= new SelectElement(comboB);
selEle.SelectByIndex(1);

Why winDriver don't see this element?