hi @AD1 you can pass it as a variable in the navigate function or set the variable on the OnChange function of the combobox based on your particular use case.
Passing variable with navigate
Navigate(yourScreen,None,{varThisValue: yourCombobox.Selected.Value}),
add a label to yourScreen and set its Text = varThisValue
Set a global Variable
On the Combobox OnChange = Set(gblThisValue,yourCombobox.Selected.Value)
add a label to yourScreen and set its Text = gblThisValue
Both these will display the selected combobox item on the labels
Result

Hope it helps,
R